The actual fighting in Advance Wars takes place between different Units. Each Unit will generally (Though on certain Missions things may change) start on 10 HP. A Unit can lose HP each time it is attacked, and attacks (Depending on whether or not the defending Unit can retaliate). Once a Unit reaches 0 HP it is destroyed and removed from the battle.
Producing Units
There are several ways how Units can arrive on the battle. They may be already placed, they may arrive at a certain point (Though that's to do with Campaign). The only way for the player to make a Unit is br producing one at the relative building:
- Base: Produces Ground Units.
- Port: Produces Naval Units.
- Airport: Produces Air Units.
- Carrier: Though not a building, Carriers may produce up to two Sea Planes.
Producing a Unit costs the player a certain amount of War Funds (See the relative Unit pages for information on each Units cost).
Fuel
All Units have a certain amount of Fuel (Or Rations for Infantry and Mechs), once a Unit runs out of Fuel then it either becomes motionless (In the case of Vehicles and Infantry) or is destroyed (In the case of Naval Units and Air Units). Fuel can be restored to a Unit by remaining on their relative building or by having it restored by a APC or Black Boat.