Kalran: Tales of the four nations/Mortar infantry

"Light mortar here."

Tactical analysis

 * Foot mobile fire support: Well suited to providing fire support for other infantry, The Mortar infantry are capable of laying down barrages of mortar rounds from range. Their mortars can clear out garrisons, and when inside buildings they throw grenades to good effect.
 * Covering fire: One of the rounds the Mortar infantry uses are smoke rounds, which not only blocks enemy line of sight but is also mixed with irritants that stuns infantry. Either allowing their allies to escape or weakening their foe before they strike
 * An explosive surprise: But their most fearsome trait is that they are invisible when stationary and can disguise themselves. Combined this with how quick it is for them to setup and pack up their mortar means they can easily barrage their foes then run before the enemy can find them
 * Not for the frontlines: A word of caution; Mortar infantry are meant to provide fire support from behind. Their mortars are unusable at short range, and useless against tanks, fast units, and heavy structures