Here are the troops needed to capture Valleys in your kingdom without losing troops.
Here are some numbers that will help.
lvl 1 territory - 100 archers and 1 militia
lvl 2 territory - 140 archers and 1 militia
lvl 3
lvl 4
lvl 5
lvl 6 territory - 1200 archers 100 militia
lvl 7 territory -1900 archers 100 militia
lvl 8 territory - 8k archers 1000 militia
lvl 9 territory - 9k archers, 1000 militia
lvl 10 territory - 10k archers, 1000 militia
I will fill in the others later after i test them again. I forget it's been awhile since i went after the smaller ones.