The 3-inch mortars of a battalion's mortar platoon gave them immediate artillery support. The mortars were excellent for softening up the enemy before an assault or for knocking out enemy machine-gun nests. The SBML (smooth-bore muzzleloading) 2-inch mortar conducted overhead fire, throwing a 1kg (2lb) high-explosive bomb in an arcing trajectory down onto the heads of the enemy, making it excellent at knocking out dug-in enemy troops.Includes includes three plastic 3-inch gun and crew sprues, six medium plastic bases, one plastic base insert sprue and one unit card.