Very interesting! I like the idea of players recruiting armies to try and liberate lands that they've been adventuring in for a while.
The recruiting table looks great! You've managed to keep everything simple which I appreciate.
But there is some bookkeeping in tracking your army and all the specific ancestries in it. Maybe a separate "army" sheet could help with that?
If my players ever get the idea to muster an army, I think I'll refer back to this supplement. Great work!