Three months was not nearly long enough for a man to become comfortable in an alien world, but it was just long enough for First Lieutenant Yoji Itami to stop jumping at shadows.
When the Third Reconnaissance Unit had first crossed the threshold of the Gate, every morning had brought some fresh, unholy absurdity. There were giant spiders lurking in ancient forests, carnivorous flora that snapped at low-flying helicopters, and beasts that looked like they had been lifted straight from the pages of a fantasy rulebook—except they smelled of rot and were considerably less charming when trying to tear open an armored personnel carrier.
Now, as the morning sun rose over the Japanese Self-Defense Forces' Forward Operating Base at Alnus Hill, Itami barely looked up when a six-legged pack beast plodded past the perimeter fence, carrying panniers of local tubers. He simply shifted his back against the cold, corrugated steel of the command prefab, took a cautious sip of canned instant coffee, and squinted at the glare of his ruggedized military tablet.
He tapped the screen. He zoomed in. He took another sip of coffee, which had gone lukewarm and tasted faintly of tin, and stared at the high-resolution image for three full seconds.
Then he looked up at the sky.
The sky above Alnus was clear, blue, and empty, save for a pair of F-4EJ Kai Phantoms executing a routine patrol vector to the east.
Itami looked back down at the tablet.
"You've got to be kidding me," he muttered.
Sergeant First Class Hitoshi Kurata stepped out of the prefab, leaning his shoulder against the doorframe. He was holding a half-eaten ration bar, his camouflage jacket unzipped at the collar to let in the crisp morning air. "What's got you sighing before eight in the morning, Lieutenant? Command cutting the coffee rations again?"
Without a word, Itami turned the tablet around.
The display was filled with a crystal-clear aerial reconnaissance photo, taken from a high-altitude surveillance drone. The subject was locked in mid-flight over a mountain range fifty miles north of Castrum Ianus.
It was a machine. Humanoid in silhouette, but undeniably mechanical, painted in deep imperial crimson with gleaming silver trim along the joints and chest. Its lines were sharp, angular, and aggressive, dominated by a massive, stylized eagle emblem cast across its breastplate. But what held the eye—what made the breath catch in the back of the throat—were the twin banners of translucent, emerald-green light fanning out from its back. Energy wings, radiating with enough raw power to distort the air around them in shimmering heat waves.
Kurata froze. The ration bar stopped halfway to his mouth. He leaned in, his eyes widening until his spectacles slipped slightly down the bridge of his nose.
He let out a long, low whistle. "Holy... Lieutenant. Is that what I think it is?"
"Depends," Itami said dryly, pulling the tablet back to zoom in on the machine's right arm, which was holding a heavy, oversized rifle with an integrated power conduit. "If you think it's a giant flying robot with energy wings, then yes. That's exactly what it is."
"They actually did it," Kurata whispered, a terrifying mixture of professional horror and otaku awe washing over his face. "That's—that's a Knightmare Frame. They built a real-life, honest-to-god Knightmare Frame!"
"Keep your voice down," Itami grunted, though he couldn't entirely blame the sergeant's reaction.
Sergeant Major Akira Tomita joined them, his heavy boots crunching on the gravel path. He took one look at Kurata's pale, ecstatic face, then at Itami's weary posture, and held out a hand. "Let me see."
Itami handed the tablet over.
Tomita scrolled through the file. The document wasn't just a single photograph; it was a comprehensive intelligence packet assembled by the Ministry of Defense's diplomatic security detail. Page after page revealed detailed ground-level imagery taken near the outskirts of Nova Roma: massive brick-and-steel industrial complexes with towering smokestacks, automated magical foundries casting reinforced armor plating, and rows of concrete hangars shielded by runic wards.
And then came the soldiers.
Tomita stopped on a close-up photo of a Roman legionnaire standing guard at a checkpoint. The soldier was dressed in segmented armor that was clearly derived from the ancient lorica segmentata, but the steel possessed an unnatural, mirror-like sheen. Glowing golden runes were etched seamlessly into the breastplate and greaves, and small, crystalline devices were fitted directly over the wrists and kinetic joints.
"Their infantry isn't wearing iron anymore," Tomita said softly, his brow furrowing as he read the intelligence commentary below the image. "Metals-testing from scrap retrieved near the border indicates a star-iron and quartz composite. High tensile strength, lightweight, and completely resistant to standard low-tier magic spells. Small-arms penetration tests... inconclusive."
"Inconclusive means 'our 5.56 rounds bounce off unless we hit a joint,'" Kurata supplied, leaning over Tomita's shoulder. "Look at the chest plate. It's angled to deflect kinetic impact, and those crystals... those are kinetic dampeners, aren't they?"
"They're improving," Tomita said, his voice dropping into the quiet, analytical register he used when assessing tactical threats. "When we first crossed through the Gate, the Saderan Empire was fighting with iron swords and wooden shields. They were two thousand years behind us. But Rome..."
"Rome isn't Sadera," Itami said, tossing his empty coffee cup into a nearby recycling bin. "Sadera was a slave state with a sword. Rome is an industrial power that happened to discover magic, electricity, and mass production at the exact same time."
"And they have an Emperor who knows how to use them," Tomita added, looking up from the screen. "Lieutenant... where did this intelligence come from? The Ministry hasn't briefed the field units on this yet."
"It came from Yanagida," Itami replied, rubbing the back of his neck. "He passed it to me off the record. Command is having an absolute meltdown behind closed doors. The Cabinet was operating under the assumption that our technological edge gave us absolute diplomatic leverage in Falmart. They thought we were the only ones who understood combined-arms doctrine, mechanized warfare, and aerial dominance."
He gestured vaguely toward the tablet in Tomita's hands.
"Now the Romans are flying around in mechanized war-suits, building concrete highways, and mass-producing enchanted armor in factories powered by localized magical reactors. The politicians in Tokyo are realizing that our 'unassailable advantage' has a very short shelf life."
"How many of those flying units do they have?" Kurata asked, his tone shifting from fanatical excitement to genuine concern.
"The report says twenty confirmed in the capital unit," Itami said. "Unconfirmed reports suggest the factories outside Nova Roma are ramping up production to output fifty a month. Maybe more once their raw material supply chains from the northern mines are fully integrated."
Kurata swallowed hard. "Fifty a month... If those things carry energy weapons capable of slicing through reinforced bunker concrete, an entire squadron of them could sweep our Cobra attack helicopters out of the sky before they even get into TOW missile range."
"Which brings us back to the most important tactical question," Tomita said, handing the tablet back to Itami. "Are they hostile?"
Itami shrugged, adjusting the strap of his Type 89 rifle. "Emperor Maximus hasn't shot at us yet. In fact, he's been aggressively polite. He signed the trade treaties, he opened the border checkpoints to civilian merchants, and he even sent us a crate of surprisingly good wine last month."
"Dangerous men are often polite, Lieutenant," Tomita observed grimly. "It keeps their enemies from realizing they're building a gallows until the noose is already around their neck."
"Maybe," Itami said, turning to look north, toward the distant, hazy mountain line that marked the boundary of Roman territory. "Or maybe he just understands something our bosses in Tokyo keep forgetting."
"What's that?" Kurata asked.
"That in a world full of dragons, rogue gods, and ancient necromancers, two guys with machine guns and flying robots have a lot more reasons to talk than to shoot each other."
…
The tactical briefing room inside the JSDF Joint Task Force Command Building smelled of damp wool, stale green tea, and expensive floor wax.
High-resolution projector screens dominated the front wall, casting a cool blue light over the assembled officers. General Hazama sat at the center of the primary conference table, his hands folded neatly over a thick paper dossier. Surrounding him were senior representatives from the Ground Self-Defense Force, Air Self-Defense Force intelligence liaisons, and a pair of tight-lipped officials from the Ministry of Foreign Affairs who looked as though they hadn't slept in forty-eight hours.
Itami sat near the back of the room, tucked into a corner seat alongside Tomita. He was dutifully attempting to look attentive, though his notebook was currently populated by a remarkably detailed doodle of an Aquila-class Knightmare fighting a dragon.
At the front of the room, an intelligence officer tapped a laser pointer against the central display map.
"To summarize our current geopolitical standing," the officer began, his voice flat and precise, "the territory of Falmart is now effectively divided into three distinct operational zones. Zone Green, surrounding Alnus Hill, remains under direct JSDF administrative control. Zone Blue, encompassing the eastern provinces and the shattered remnants of the Saderan capital, is currently locked in a messy three-way civil war between Imperial loyalists, rebel factions, and autonomous warlords."
The laser pointer shifted west, illuminating a vast swath of territory highlighted in deep, aggressive crimson.
"Zone Red," the officer continued, "comprises the territory of Nova Roma and its expanding vassal states. Over the past ninety days, Imperial Emperor Maximus has consolidated his control over the western trade corridors. He has instituted sweeping administrative reforms, standardized currency, and established an automated industrial base that defies traditional economic modeling."
The slide changed. A schematic of an industrial complex filled the screen, overlaid with thermal imaging data.
"Our reconnaissance satellites have confirmed the activation of three major manufacturing hubs near the capital," the officer stated. "These facilities utilize a combination of heavy mechanical engineering and high-density magical energy grids. They are producing structural steel, refined copper, high-grade magical alloys, and standardized military equipment at a rate that surpasses pre-war European industrial outputs during the mid-twentieth century."
A murmur rippled through the room. A GSDF colonel raised his hand. "Where are they getting the energy? A pre-industrial society cannot simply jump to heavy industrial smelting without massive coal or oil consumption. We haven't detected any major coal mining operations in Zone Red."
"They aren't using fossil fuels, Colonel," the intelligence officer replied, clicking to the next slide. A cross-section diagram of a Roman core reactor appeared. "They are utilizing concentrated mana-quartz arrays. According to our diplomatic observers, the technology allows them to extract thermal and kinetic energy directly from localized ley lines, channeling it through runic transformers. It is clean, virtually silent, and absurdly efficient."
"Magic," the colonel muttered, leaning back with a scowl. "It's always bloody magic."
"It is not merely magic, Colonel," General Hazama spoke up, his voice calm, deep, and commanding. The room immediately fell silent. "It is magic systematized. The Saderans treated magic as an art form practiced by elite scholars and court wizards. Emperor Maximus treats magic as an engineering discipline. That is the fundamental difference."
Hazama gestured toward the intelligence officer. "Continue."
"Yes, General. Regarding military capabilities: the Roman military has undergone a complete structural reorganization. The traditional legion model has been integrated into a modern combined-arms doctrine. Infantry units are now equipped with the Aegis-Celestial Mark I armor, which provides passive resistance against kinetic impacts and environmental hazards. Their artillery units have been upgraded with long-range magical siege engines capable of firing high-explosive payloads with precision comparable to our own 155mm howitzers."
The slide clicked again, and the room seemed to lose two degrees of temperature.
A full-3D rendering of the Aquila-class Imperial Knight rotated slowly on the screen.
"And finally, the Aquila-class," the officer said quietly. "A mechanized, single-pilot aerial combat unit. Length: 4.8 meters. Power source: synthesized type magical reactor. Flight capability: sustained vertical takeoff and high-altitude vectoring via high-density energy wings. Armament: high-frequency vibration blades, factsphere sensor arrays, and variable-output particle rifles."
The Foreign Affairs representative leaned forward, his knuckles white against the mahogany table. "Can our anti-air systems target them?"
"In theory, yes," the officer replied. "Our Type 93 Short-Range Surface-to-Air Missiles and radar-guided AA guns should be able to lock onto their thermal and magical signatures. However... Their flight profile is highly non-linear. They do not fly like fixed-wing aircraft or helicopters. They can stop dead in mid-air, execute ninety-degree directional shifts without shedding velocity, and utilize energy barriers that may deflect proximity fuses."
"What about air-to-air?" an ASDF major asked. "Can an F-4 or an F-2 engage them?"
"At long range, using Beyond-Visual-Range radar missiles like the AIM-7 Sparrow, we retain a distinct speed and distance advantage," the intelligence officer explained. "However, if an Aquila closes to visual range, its maneuverability far exceeds any conventional jet aircraft. In a dogfight within two miles, the Aquila holds a decisive tactical advantage."
A heavy, suffocating silence descended over the briefing room.
For months, the JSDF had operated with the comfortable assurance that their modern firepower made them invulnerable in Falmart. They had wiped out tens of thousands of Saderan cavalry at Alnus Hill without taking a single casualty. They had shot down wyverns like clay pigeons. They had treated the local factions like historical reenactors who had stumbled into a modern war zone.
That comfort was gone.
"There is one more matter," the intelligence officer added, clicking to a diplomatic map. "Emperor Maximus is not merely building a military. He is building an alliance network. Envoys from the Baharuth Empire, the Re-Estize Kingdom, and several autonomous demi-human tribes have been spotted entering Nova Roma. The Romans are offering trade agreements, infrastructure development, and agricultural support in exchange for raw materials and exclusive diplomatic recognition."
"He's isolating us," the Foreign Affairs official whispered, horror creeping into his voice. "He isn't attacking us militarily. He's surrounding us diplomatically and economically. If he secures trade monopolies over the northern crystal mines, our access to local magical resources will be completely cut off!"
"He isn't isolating us," Itami spoke up softly from his corner.
Every head in the room snapped toward him. General Hazama turned his sharp, piercing gaze onto the young lieutenant.
"Care to elaborate, Lieutenant Itami?" Hazama asked.
Itami stood up, adjusting his tunic. "Emperor Maximus knows we have the Gate, sir. He knows that behind Alnus Hill sits the entire industrial weight of modern Japan. He knows that if he starts an all-out war with us, he might destroy our expeditionary force, but Japan would respond by mobilization. He doesn't want a war of attrition with an industrial nation from another dimension."
"Then what does he want?" the Foreign Affairs official demanded.
"He wants parity," Itami said plainly. "He wants to make sure that if Japan ever decides to get aggressive, the cost of invading Roman territory would be so catastrophically high that our government would never even consider it. He's building a deterrent."
Hazama watched Itami for a long moment, a ghost of a smile touching the corner of the old general's lips. "Mutually Assured Destruction. A classic Cold War concept."
"Yes, sir," Itami replied. "And right on cue, he's sent us an invitation."
Itami reached into his pocket and pulled out a heavy parchment envelope, sealed with a crest of golden wax depicting a Roman eagle clutching a sword.
"This arrived at the perimeter gate an hour ago, addressed to the Third Reconnaissance Unit," Itami said. "His Excellency Emperor Maximus has officially invited our team—and an observer group from JSDF Command—to attend a live-fire military demonstration at Castrum Ianus three days from now."
Hazama leaned back in his chair, tapping a pen against his dossier. "A demonstration, you say? He wants us to watch his new toys in action."
"Yes, sir," Itami said with a dry chuckle. "He's flexing."
Hazama smiled thin, dangerous smile. "Then we had better accept. Assemble your unit, Lieutenant. You're going back to Rome."
…
The military highway leading from the border province to Castrum Ianus was a marvel of civil engineering that left the Japanese engineering corps green with envy.
Instead of the crude, rutted dirt roads that typically connected the cities of Falmart, the Roman road was a continuous, fifty-yard-wide ribbon of dark, aggregate concrete. It was perfectly level, sloped at the edges for drainage, and reinforced with runic stabilizing grids laid directly into the sub-base. Every half-mile, tall stone pillars crowned with glowing, quartz-fueled lanterns illuminated the highway, casting a soft, white light that made night travel as safe as day.
Itami sat in the passenger seat of the lead Type 73 light truck, watching the countryside roll past. Behind them, two Type 96 Armored Personnel Carriers and a pair of High Mobility Vehicles rumbled along the smooth concrete, carrying the members of the Third Reconnaissance Unit and a select team of JSDF technical observers.
Kurata was driving, his hands tight on the steering wheel, his eyes darting to the side of the road every few seconds.
"Look at those aqueducts," Kurata muttered, nodding toward a series of towering stone arches spanning the valley to their left. "They aren't just carrying water. Look at the blue glow along the channels."
Tomita, sitting in the back with his rifle resting across his knees, leaned out the window. "Magical conduits. They're pumping freshwater to supply the agricultural districts. Look at those crops."
Itami looked. The fields surrounding the highway were unnaturally lush. Wheat grew tall and thick, its stalks heavy with golden grain, despite it being late in the dry season. Farmers—a mix of local humans, cat-eared demi-humans, and sturdy dwarves—worked side by side, using mechanized, ox-drawn plows fitted with runic soil-aeration blades.
"No feudal serfdom here," Itami observed softly. "They're paying those workers. You can see the coin pouches on their belts."
"He's building a middle class," Tomita said, his voice laced with reluctant respect. "An empire built entirely on slaves and conquest eventually collapses under its own weight when the expansion stops. But an empire built on trade, agriculture, and industry? That lasts."
An hour later, Castrum Ianus rose out of the valley floor like a mountain of worked stone and iron.
The original fortress—a simple, timber-and-stone military outpost built during the early months of the Gate opening—was gone. In its place stood a sprawling, multi-tiered citadel city. Massive outer walls of black, reinforced basalt rose sixty feet into the air, crowned with automated ballista towers and energy-shield projectors.
Beyond the walls, the skyline was dominated by towering concrete hangars, deep subterranean access shafts, and the grand, marble-fronted facade of the Imperial Logistics Command. Thousands of people moved through the lower gates: merchant caravans carrying raw timber and ore, heavily armored Roman supply trucks rumbling on solid rubber tires, and squads of legionnaires marching in crisp, terrifying synchronization.
As the JSDF convoy approached the main gate, the heavy iron portcullis was already raised. A detachment of Roman Honor Guards stood at attention on either side of the road, their Aegis-Celestial armor gleaming in the afternoon sun. They held seven-foot spears capped with vibration points, their crimson cloaks snapping in the wind.
A young Roman officer stepped forward, holding a gilded baton. He approached the lead vehicle, raised a hand in a crisp, Roman salute, and spoke in fluent, barely-accented Japanese.
"Welcome to Castrum Ianus, First Lieutenant Itami. His Imperial Majesty Emperor Maximus awaits your arrival at the Proving Grounds."
Kurata nearly stalled the truck. "He spoke Japanese," he whispered loudly. "Did you hear that? His accent was better than mine!"
"I heard," Itami muttered, stepping out of the truck and returning the salute. "Lead the way, Captain."
The convoy was guided through the lower city, bypassing the bustling civilian markets and descending deep into the subterranean military complex beneath the citadel.
The air grew cool and damp, smelling faintly of ozone, hot machine oil, and ground quartz. Massive, electric-arc lanterns illuminated the vast, cavernous tunnels, which were wide enough to allow two tanks to drive side by side. Deep below the earth, the true scale of Rome's military transformation became shockingly apparent.
They passed automated assembly lines where giant hydraulic presses slammed down onto glowing sheets of star-iron, stamping out breastplates with mechanical precision. They passed chemical laboratories where mages in heavy, protective aprons mixed glowing, iridescent fluids into stabilized glass canisters.
And then, they entered Staging Hangar Seven.
The JSDF soldiers piled out of their vehicles, their boots clicking against the polished concrete floor. They stopped as one, a collective gasp echoing through the unit.
Suspended from heavy steel gantries along the far wall were twenty Aquila-class Imperial Knights.
Up close, the machines were even more intimidating than the drone photographs had suggested. They stood nearly sixteen feet tall, their crimson-and-silver armor smooth and seamless, free of the rough welds or exposed wiring that characterized early human prototype vehicles. Their sharp, avian helmets stared down with cold, unblinking green optical sensors. Mounted on their backs were the folded, sword-like struts of the energy wing generators, while heavy V.A.R.I.S. particle rifles were locked securely into thigh-holsters.
A dozen Roman technicians, dressed in heavy grey overalls and wearing thick safety goggles, moved along the catwalks around the machines, conducting pre-flight diagnostic checks with glowing runic tablets.
"Dear God," a JSDF technical observer whispered, clutching a camera to his chest. "Look at those joint actuators. They aren't using traditional hydraulics. It's a synthetic muscular weave... powered by localized conduits!"
"Lieutenant," Kurata breathed, his eyes wide and completely unblinking. "Can I touch one? Just one touch?"
"If you touch it and it disintegrates you, I'm not doing the paperwork," Itami replied, though his own heart was hammering against his ribs.
"I assure you, Sergeant, it won't disintegrate you unless the pilot activates the defense matrix," a calm, commanding voice echoed from the central catwalk.
The JSDF soldiers snapped to attention.
Emperor Maximus descended the iron staircase, flanked by General Marcus and Chancellor Gaius. The Emperor did not wear his ornate crown or diplomatic robes today. He was dressed in a tailored, dark-crimson officer's uniform, fitted with subtle, enchanted steel shoulder guards. His gladius hung at his hip, its pommel carved from a single piece of dark quartz.
Maximus walked with an easy, unhurried grace, his sharp blue eyes sweeping over the Japanese delegation before settling on Itami.
"Your Excellency," Itami said, bowing respectfully.
"Lieutenant Itami," Maximus replied, offering a warm, genuine smile. "It is good to see you again. I see you brought your entire team. And some very curious observers from your General Staff."
Maximus offered a polite nod to the JSDF technical officers, who immediately bowed so low their foreheads nearly touched their knees.
"Thank you for inviting us, Your Majesty," Itami said, keeping his tone carefully neutral. "We weren't expecting... well, to be honest, we weren't expecting all of this." He gestured broadly toward the looming rows of Knightmares.
Maximus chuckled, a low, rich sound that echoed off the high ceiling. "A few months ago, neither was I, Lieutenant. But necessity is a harsh schoolmaster, and the New World is a remarkably dangerous neighborhood. If one does not adapt, one becomes history."
He turned to look up at the lead Aquila, unit designation 01, painted in pure gold and crimson.
"When your military first crossed the threshold of the Gate," Maximus said softly, his voice carrying a weight that felt far older than his young physical appearance, "you demonstrated a profound truth. You showed this world that brave men with swords and armor are utterly meaningless in the face of industrial firepower, air dominance, and rapid logistics."
He turned back to look Itami directly in the eye.
"Japan taught me that lesson, Lieutenant. Aquila is simply my response."
General Marcus stepped forward, his heavy leather boots thudding against the floor. He glanced at the JSDF team with a mixture of professional pride and thinly veiled challenge. "If Your Majesty permits, the pilots are ready. The proving ground has been prepped for the live-fire demonstration."
Maximus nodded. "Proceed, General. Show our guests what the Legions of Rome can do."
…
The observation deck overlooked the Great Northern Proving Ground—a massive, barren canyon five miles long and two miles wide, surrounded by sheer granite cliffs.
The JSDF observers stood behind reinforced, bulletproof glass, equipped with high-powered binoculars and tactical recording devices. Outside, the afternoon air was crisp and dry, smelling of desert dust and sagebrush.
"Sensors active," a Roman operator announced over the intercom. "Target arrays deployed."
Across the valley floor, three miles away, a series of reinforced testing targets had been set up. There were heavy, three-foot-thick walls of solid armor plate, simulated infantry formations constructed from reinforced iron constructs, and a trio of captured, wild earth-drakes tethered inside heavily ward-shielded enclosures.
Suddenly, a low, resonant thrum shook the glass of the observation deck.
Down in the staging area below the cliff, the twenty Aquila-class units initiated their startup sequence.
The sound was not the clanking, sputtering roar of a diesel engine, nor was it the high-pitched whine of a jet turbine. It was a deep, thrumming chime—a harmonious, resonant frequency that vibrated directly in the teeth and chest cavity of everyone present.
Along the limbs of the machines, golden runic circuits flared into brilliant, pulsing life.
And then, the energy wings ignited.
With a deafening WHOOSH that blew dust and gravel hundreds of yards back, twenty pairs of brilliant, emerald-green light banners erupted from the spin-packs of the Knightmares. The raw energy was so intense that the air around the hangar exit turned into a shimmering, distorted heat haze.
"Launch!" Marcus commanded.
The twenty Aquilas did not roll down a runway. They did not leap into the air.
They simply vanished.
They accelerated from a dead standstill to Mach 1.5 in under two seconds. A thunderous sonic boom shattered the silence of the canyon, rattling the observation deck windows so hard that Kurata instinctively ducked.
The crimson war machines shot into the blue sky like red lightning bolts, leaving brilliant, glowing green contrails behind them. They climbed almost vertically, defying gravity and aerodynamics, soaring three thousand feet straight up before executing a simultaneous, perfect vector shift.
"Look at that turn!" an ASDF observer screamed into his recorder, his hands shaking as he adjusted his camera focus. "That's a ninety-degree lateral shift at supersonic speeds! No human pilot could survive those G-forces! The inertia would liquify their organs!"
"The kinetic dampening field inside the cockpit negates internal acceleration," Maximus explained calmly from his position at the railing, his arms crossed behind his back. "The pilot feels nothing more than a gentle pull."
Up in the sky, the Aquilas split into tactical element pairs.
The lead flight dived toward the canyon floor. As they plunged toward the target array at breathtaking speeds, their Factsphere sensor arrays—mounted on their chests—rotated, emitting high-frequency magical pulses that mapped the terrain in three dimensions.
"Target lock acquired," the lead pilot's voice crackled over the tactical comms. "Executing Strike Pattern Alpha."
The lead Aquila drew its V.A.R.I.S. particle rifle. The weapon's barrel opened, exposing a core of glowing blue mana-crystal.
BOOM.
A beam of concentrated, high-density magical particle energy erupted from the rifle. The beam struck the three-foot-thick target armor plate three miles away.
There was no dramatic ricochet. No denting. The armor plate simply... vanished. The heat and kinetic energy of the beam vaporized the metal instantly, leaving a glowing, white-hot crater in the cliff face behind it, followed by a shockwave that kicked up a two-hundred-foot wall of pulverized dust.
"Jesus Christ!" Tomita swore, his face turning pale. "That's not a rifle! That's a naval gun!"
Before the dust could even settle, the second flight of Aquilas swept over the simulated infantry formation. They deployed their Slash Harkens—heavy, rocket-propelled steel grapples connected to high-tensile energy cables. The harkens shot downward, impaling the iron constructs, before the Knightmares fired their reverse thrusters, ripping the multi-ton iron targets into the air and shattering them against each other in a shower of sparks and mangled metal.
Then came the final demonstration.
The three wild earth-drakes—massive, fifty-foot long reptiles with scales hard enough to deflect heavy machine gun fire—were released from their enclosures. Panicked and enraged by the noise, the beasts let out deafening roars, charging across the canyon floor, their heavy tails whipping the dirt.
A single Aquila unit descended, hovering ten feet off the ground in front of the lead drake. Its energy wings flared, keeping it perfectly suspended in mid-air.
The pilot reached to his hip and drew the machine's primary melee weapon: the seven-foot Maser Vibration Gladius.
The pilot activated the sword. The blade didn't glow, but it began to hum—a high-frequency vibration so intense that the edges of the blade blurred, turning into a shimmering line of pure kinetic energy.
The earth-drake lunged, its massive jaws snapping shut with enough force to crush an armored truck.
Aquila didn't dodge. It simply stepped sideways, a fluid, blindingly fast motion, and executed a single, disciplined thrust.
The vibration blade passed through the drake's thick, armored neck as if it were warm butter. There was no resistance. No impact shock. The blade sliced clean through scale, muscle, and bone.
The drake's massive head slid off its shoulders, crashing into the dirt, followed a second later by its colossal body, which slid to a halt in a cloud of crimson dust.
The Aquila stood motionless beside the fallen beast, its vibration sword held low, its green optical sensors gleaming coldly in the sun.
Silence descended over the observation deck.
The Japanese officers stared through the glass. No one spoke. No one took notes. The technical observers held their cameras at their sides, their mouths open in stunned, helpless disbelief.
Itami slowly lowered his binoculars. His hands were completely steady, but his stomach had dropped into a cold, dark void.
He looked over at Maximus.
The Emperor of Rome was not smiling. He was not gloating. He stood at the glass, his face calm, serene, and entirely unreadable, as if he were simply reviewing the output of a well-maintained factory line.
"The exercise is complete," Marcus announced, turning off the tactical display. "All targets eliminated. Total engagement time: two minutes, fourteen seconds."
Gaius, standing beside the door with a thick financial ledger tucked under his arm, let out a soft, weary sigh. "And the total cost of spent energy crystals for those two minutes was forty thousand denarii. I am going to have a stroke."
…
Later that evening, as the sun dipped below the rugged western horizon, bathing Castrum Ianus in deep shades of gold and purple, a private dinner was hosted beneath a marble pavilion overlooking the upper gardens.
The air was pleasantly warm, filled with the scent of blooming night-jasmine and roasted meats. Slender Roman servants moved quietly between the tables, pouring chilled white wine into crystal goblets and laying out platters of spiced lamb, fresh grapes, and crusty, baked bread.
The mood among the Japanese delegation was remarkably quiet. Kurata was picking at his lamb with a fork, his usual bubbly enthusiasm completely drained. Tomita sat stiffly, his eyes scanning the surrounding balcony where Aegis-armored guards stood with their hands resting casually on their gladii.
Itami sat across from Emperor Maximus at a long, low mahogany table.
Maximus had stripped off his military tunic, wearing only a simple white linen shirt with the sleeves rolled up to his elbows. He looked remarkably human—just a handsome, dark-haired young man enjoying a meal after a long day of work.
"You aren't eating much, Lieutenant," Maximus noted, taking a sip of wine. "I hope the food is to your liking. I had the kitchen prepare the lamb using local herbs from the southern valley."
"The food is excellent, Your Majesty," Itami replied, setting his fork down. He picked up his wine glass, swirled the pale liquid, and looked at the Emperor. "Just a bit distracted, I suppose."
"By the Aquilas?" Maximus asked mildly.
"By the Aquilas," Itami agreed. He took a sip of wine, let the crisp, fruity flavor settle on his tongue, and leaned forward, resting his elbows on the polished wood. "Your Majesty... can I ask you an honest question? off the record?"
Marcus, sitting at the adjacent table, stiffened slightly, his hand moving toward his sword. Maximus held up a single, placating finger, silencing his general instantly.
"Of course, Lieutenant," Maximus said softly. "Between soldiers, there is always room for honesty."
Itami held the Emperor's gaze. "Are those machines built to fight Japan?"
The air beneath the pavilion suddenly felt very heavy. Kurata stopped chewing. Tomita's hand twitched beneath the table.
Maximus didn't flinch. He set his wine glass down with a soft, quiet clink. He didn't offer an immediate denial. He didn't give a grand, theatrical speech about eternal friendship or peaceful coexistence.
He simply looked at Itami with clear, intelligent, and unblinkingly honest eyes.
"Could they fight Japan?" Maximus asked quietly. "Yes. If your government decided to march its armies west, cross my borders, and demand the subjugation of the Roman people... those machines would tear your tanks to scrap and rain fire upon Alnus Hill."
Itami didn't blink. "And if we don't?"
"Then they are the guardians of my borders," Maximus said smoothly. "They are the deterrent that ensures your government—and whatever politicians sit in Tokyo—treats the Roman Empire as an equal partner rather than a primitive colony ripe for economic exploitation."
Maximus leaned forward, resting his chin on his interlaced fingers.
"Your nation possesses weapons of terrifying power, Lieutenant. You have aircraft that fly faster than sound, missiles that strike from miles away, and artillery that can level a fortress in minutes. When you crossed the Gate, you held total dominance over this world. You were gods walking among mortals."
A small, sharp smile touched the Emperor's lips.
"I do not like living at the mercy of gods, Lieutenant Itami. So I raised my people up until we could stand on the same mountain."
Itami stared at the Emperor for a long moment. Then, slowly, a tired, genuine smile broke across his face.
He picked up his wine glass and held it out.
"To stay on our own sides of the mountain," Itami said.
Maximus smiled back, his eyes warming with genuine respect. He raised his own glass and tapped it against Itami's.
"To peace through superior firepower, Lieutenant."
They drank.
…
It was nearly midnight when the JSDF convoy cleared the main gates of Castrum Ianus and began the long journey back to Alnus Hill.
The moonlight washed over the smooth concrete highway, making the dark road look like a silver ribbon cutting through the shadow-draped valleys of Falmart.
Inside the lead Type 73 truck, the air was quiet, save for the rhythmic thrum of the diesel engine and the soft crackle of the long-range radio chatter.
Kurata drove in silence for a long time before finally clearing his throat. "Lieutenant?"
"Yeah?" Itami murmured from the passenger seat, his head rested against the window glass as he watched the glowing runic streetlamps flicker past.
"Is it weird that I'm terrified of him... but I also kind of respect him?"
Tomita chuckled quietly from the back seat. "That's not weird, Kurata. That's called basic survival instinct. Emperor Maximus isn't a tyrant or a lunatic like the Saderan Prince Zorzal was. He's a visionary. He's building an empire that can survive in a world of monsters."
"He's an otaku's worst nightmare and best dream rolled into one," Kurata muttered, shaking his head. "He took every cool concept from anime, sci-fi, and history, fused it with magic, and turned it into a real-life industrial superpower. If he ever opens a portal to Earth, he's going to make a fortune selling high-grade magical alloys and mecha tech."
"Let's hope it stays at trade," Tomita said soberly. "Lieutenant... what are you going to tell General Hazama?"
Itami closed his eyes, leaning back against the headrest.
"I'm going to tell him the truth," Itami said softly. "I'm going to tell him that Rome isn't our enemy, but they aren't our subjects either. I'm going to tell him that if Tokyo wants to deal with Emperor Maximus, they had better send diplomats, not soldiers."
"And what if Tokyo doesn't listen?" Kurata asked quietly. "What if the politicians insist on trying to pressure him?"
Itami opened one eye, looking out at the vast, starry sky of Falmart—a sky that was no longer ruled by dragons, but by the crimson-and-silver shadows of flying steel knights.
"Then I'm taking my pension," Itami said plainly, "and moving to a farm as far away from the Gate as humanly possible."
Kurata laughed, the tension finally breaking in the cab. "Take me with you, Lieutenant. I'll tend the vegetables."
"Deal," Itami smiled, closing his eyes again as the truck rumbled forward into the night.
…
High above Castrum Ianus, standing on the wind-swept balcony of the central command tower, Emperor Maximus watched the red taillights of the Japanese convoy disappear into the distant darkness.
The wind whipped his dark cloak around his legs, bringing with it the faint scent of ozone from the lower industrial districts, where the automated foundries were already hammering out the next generation of star-iron armor plating.
General Marcus stepped onto the balcony, holding a leather-bound report. "The Japanese delegation has cleared the outer perimeter, Your Majesty. No suspicious activity detected. Their technical observers were... thoroughly shaken."
"They are pragmatists, Marcus," Maximus said softly, not turning around. "They saw what we built, and they calculated the cost of conflict. They will report to their superiors that war with Rome is an unacceptable risk. That was the goal."
"And what of our next production phase?" Marcus asked, opening the dossier. "Valerius reports that Factory Complex Four will be fully operational by the end of the month. We can increase Aquila production from fifty units a month to one hundred."
"Do it," Maximus ordered quietly. "And tell the magical research division to begin scaling up the blueprints for the Guren-variant tactical core. I want landspinners integrated into the next infantry support frames by next season."
Marcus bowed deeply. "At once, Your Majesty."
The general turned to leave, but paused near the doorway, looking back at the young Emperor. "Your Majesty... do you truly believe peace with Japan will hold?"
Maximus looked up at the moon—the single, pale satellite that illuminated this alien world.
"Peace holds as long as the cost of war remains too high, Marcus," Maximus said, his voice dropping into a quiet, chilling register. "Japan is not our only concern. Beyond the western mountains lies the Sorcerer Kingdom. Beyond the oceans lie ancient dragons and forgotten gods. We are building an empire that must stand not just for a decade, but for a thousand years."
He turned away from the balcony, walking back into the warm, golden light of his strategic command room, where massive maps of the New World lay spread across the central table.
"Tell the foundries to double the shifts," Emperor Maximus commanded, his eyes burning with absolute, unshakeable purpose. "We have a world to win."