The fact that Grinot - a regular regiment commander - was sent to Earth showed that the Sovereign didn't see Earth as something worth taking seriously, and he believed that he only needed one Regiment to handle them since they were only a Rank II world. In fact, Grinot told JAson that everyone on Radagan viewed Earth as a lower-tier world that they didn't need to take seriously. That was why they didn't bother organising the army at first, and they just called the phantoms to handle things. But if Grinot and the others don't return soon, then Grinot was certain that the Sovereign would finally send out a General.
Jason's eyes narrowed as his mind began running through the possibilities.
'It'll be difficult to deal with all the Generals at the same time. They're all SS Rank, so they'll be as strong as I am. The only subordinates that can match their power are Ragnar, Azrael, and Raya, and if I add a few more points, then Fenrir would be able to match them as well. It's not enough.'
