Mech is short for Mechanized Infantry, which should give you a clue on how to use them. Mech units retain the capturing abilities that are natural to infantry, but are also heavily armed with bazooka cannons, which pack enough punch to match a Tank. Despite the high firepower, Mech units remain quite cheap at barely 3000g, which makes them easily the most cost-effective unit in the game.However, while Mech’s Bazookas have the same firepower as a tank, they lack the strong armor that comes along. Mech units will be severely hindered when attacked by units they can’t quite handle, like Anti-Airs and B-Copters. Not to mention that they’re also the slowest unit in Advance Wars, at simply two tiles of movement per turn.

Still, Mech units are quite handy and represent a direct threat to the enemy. They can traverse all land-based terrain with no penalties at all, which also means they can use terrain defense to their favor when engaging in combat. Their low cost allows them to be a very effective support unit in battle, and with the ability to capture tucked along, so much the better.