After the experience of gas in World War I, the Americans added a Chemical Corps into the army armed with 4.2" mortars to fire poisonous gas. The near-total absence of chemical on the battlefield in World War II led to a rapid reorganisation of these units, which became heavy mortar sections.
| Cost: | 46pts (inexperienced), 65pts (Regular), 84pts (Veteran). |
| Team: | 4 men. |
| Weapon: | 1 heavy mortar. |
| Options: | May add a spotter for +10pts |
| Special Rules: | Team Weapon Fixed Indirect fire HE |
Models supplied unassembled and unpainted