Mobility is very important for an army.
Transport aircraft provides a big mobility, for soldiers, vehicles and support.
That's why we need at least one transport aircraft with features like, for example :
- transport and deployment for soldiers, vehicles and ammo.
- parachutage of those soldiers, vehicles and ammo.
- ability to refuel other aircraft (CAS or AA).
- ability to land on short and unprepared runways.
This aircraft could be available in different versions (for soldiers transport, vehicles transport, aerial refueling...)
I know that it's rather hard to do but, one more time, it's very important in an army.