No assault would be complete without miners. That's exactly what Sappers do: They mine the ground with very high-damage land mines that trigger as enemy units walk over the mines. The mines will hurt allied units that are nearby when mines are triggered. In addition to land mines that cause damage, Sappers also have Chemical and EMP mines.
Another useful ability of the Sapper is given to them by an item that removes land mines. Once activated, the Sapper can walk around in an area that was mined by the enemy, and remove any mines within a small area around it. This is invaluable when heading for a known to mined area with others.
Sappers are also able to equip a self-destruct mechanism which is more effective than the SD mechanism found on fallout engines.
