Many players, mostly amateurs, collect their army in one point and just sending it against the enemy. The game already has practical tools to ensure that such actions are not simply worth it. My idea would make it almost impossible, and also will improove the warfare in different terrains.
So the idea is the following
The terrains get a combat width number: for example in open fields the maximum number of fightin units would be 20, In forests 10, and in the mountains and cityes 5. The units over the number wouldnt fighting, they can only reinforce the fighting units .
Also the units over the combat width number could be withdrawed from the battle
+ idea: every fortofication would increase your combat width number with +1
+ in your own core provinces you get +1 combat width bonus
So the idea is the following
The terrains get a combat width number: for example in open fields the maximum number of fightin units would be 20, In forests 10, and in the mountains and cityes 5. The units over the number wouldnt fighting, they can only reinforce the fighting units .
Also the units over the combat width number could be withdrawed from the battle
+ idea: every fortofication would increase your combat width number with +1
+ in your own core provinces you get +1 combat width bonus