Base Defense:
Can only be built around the entrance of a base and can fire at both ground and air units. It cannot move.
Flaks have an extremely strong armor. The more units shoots at it, the less effective each individual shot will be. Example: 100 DANA howitzers do 3 times as much damage as 10 DANA howitzers.

(Min range means the weapon range on non-firing enemies, the max range on currently firing enemies, +2 range on enemies that fire on units with flag that don't defend themself)

Flag:
- Temporarily increases base defense armor by 10 times.
- Unit Flag: If the base has a flag, boats and tanks near the base also get a flag when they are not moving and not fighting. The higher the base defense upgrade level, the more armored the tanks and boats around the base. If the base is attacked, they only keep their flag if they don't move. It may take some minutes until the flag operative on the units.

Tanks / ground vehicles:
Have the advantage of being able to drive everywhere on the map except obstacles such as bases, rivers, mountains etc.
If they have no Antiair weapons, they are defenseless against air units.
They can leave the map via highways (who are in the middle of each map edge) to get to other maps.

amphibious vehicle:
Can drive on land and swim on water, but are slower on water. They have weak armor to be buoyant. They can get to other maps by highway, by water map edge as well as by aircraft carrier.


Boats and submarines:
Are limited to the river but have very low fuel costs and a very high weapon range.
If they have no Antiair weapons, they are defenseless against air units.
They can leave the map over the water at the edge of the map to get to other maps.

Air units (Helicopters, airplanes, VTOLs and airships):
Can navigate anywhere on the map, overfly obstacles and travel fast. They can shoot tanks, boats and trains (that do not have antiair weapons can) without that they can shoot back to the air units.
Air Units can leave the map via highways (are in the middle of each map edge) to get to other maps.