If vanilla version do not add battalions I hope to gether team to do it. Here's how Delenda Est would do battalion and formation.
Troops are no longer individuals, they are part of a group or battalion. Guys, I will give you the rundown of how it would work.
Soldiers are trained in battalions and live and die in battalions. A battalion of melee infantry would have 24 soldier for example. They are trained 1 battalion at a time. Shift-train queue up 5