A tank being promoted to level 
, then 
, for one and two kills.
In Advance Wars: Days of Ruin units have the ability to level up. Levels are earned when a unit destroys and opponent's unit. Each unit can be leveled up thrice. The following levels in order are:
- Level
- Level
- Level (Days of Ruin) or (Dark Conflict)
- Medal
Two Battle Helicopters at level .
Levels , , and 
are earned for destroying one, two, and three units respectively. The medal 
is unique to the one unit on the field with a CO boarded. The medal provides the same bonuses as Level . Each Level provides different boosts:
- Level : +5 Attack
- Level : +10 Attack
- Level : +20 Attack and Defense
- Medal : +20 Attack and Defense
You can determine what the enemy is by the icon on the unit. It would be a , a , or a each representing their appropriate level.
Levels are not influenced by health or cost. A bomber destroying a 1HP infantry will level up the same as destroying a 10HP war tank.
If two units join together, the highest rank is retained.
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