The Great Divider had been activated. The four of them could see it as the aircraft flew over the area outside of District 1.
They could see the destruction of the other districts, and only District 1 remained in its original position. On their way to District 1, they saw countless buildings destroyed or burned, and corpses strewn everywhere amidst the waves of zombies. It certainly wasn't good news for everyone, but at least they could feel relieved for now that The Great Divider had managed to stop a large group of zombies from approaching the district.
District 1 was like an island surrounded by a narrow sea. Many zombies couldn't continue approaching the district because of the presence of the body of water. Some of them tried to jump into the water, but they ended up struggling underwater because they couldn't swim.
