Maxwell waited for the rest of their troupes to arrive through teleportation since most would surely arrive three days later. The fastest they could do so.
They will need to use numbers to calm the kingdom after the war and for them to show that they have won the war.
And to decide on how they will handle this manner.
Of course, Archibald will be the one deciding towards the end.
It was a long war, taking up a few months of their time.
But they were able to take the win only because Circinus Kingdom's plan ended up having loopholes because of Luna and the rest, who were able to support the rest. And prepare them by teaching a few new skills here and there.
Also, one of the reasons why they are lacking is because Harland did not ever think that they would choose infiltration while the war was still ongoing.