I understand this is a rebellion war, but I have thoughts about how plauyers can spend money.

We see in modern day militia groups and private armies are used by large, small, and even rebel nations. IT would be neat to have the ability to call various military supportt groups for money. You can have different types of miitary (local militia, private military, Bandit forces) with corresponding vehicles. They could be limited to optins like hiring patrol teams with armored offroads to 3-4 men patroling on foot.

For example: a mission could include securing a radio tower or communications system allowing for a window of cmmunication with ouside forces. Then you can choose to purchase X am,amount of men and include X vehicles. At the end have a tallied cost of all the equipment and vehicle which would be expensive to the player.