SD:S.IG 33

 is a German Support unit.

Overview
15-cm s.I.G. 33 is one of the standard infantry gun with two found in the cannon company of the German Infantry Regiment. This infantry gun was the largest any nation had designated. These infantry guns can fire HE or smoke shell up to 6000 yards away. Earlier version were designed only for horse carriage but later version that had the capability for motorized towing had no solid rubber tires and lack of springing prevented it from going faster the 10 mph.

In the Infantry Gun Company in the Grenadier Regiment has a two S.IG 33 in a Infantry Gun Platoon along with three two IG 18 Infantry Gun Platoons.