Ammunition and Fuel
There are two kinds of resources you need to manage in Sudden Strike 4: ammunition and fuel.
Vehicles can be supplied with different kinds of ammunition. Each vehicle has a predefined ammo capacity. When you run low on ammunition, you can use supply trucks and stations to replenish your ammo. The system automatically supplies your unit(s) with the correct kinds of ammunition when refilling.
Most of the vehicles have limited fuel capacity. The unit consumes fuel while moving. If it runs out of fuel, the unit stops. Fuel can be replenished by support units and/or at supply areas.