The Mach is a self-contained flying bomb designed to clear clustered enemies. Once it gets close to its target, it dives down and explodes.
Machs explode when they attack. Make sure to only use them against critical targets.
Machs have low health, so be sure they aren't spotted by your opponent's anti-aircraft units before it's time to strike.
Machs can target ground and air units, making them useful in a variety of situations.