"Stalingrad 42" is a submod for "Eastern Front". As the name might imply, it focuses on the brutal struggle over the city of Stalingrad, from the Summer of 1942 to the capitulation of the pocket in February 1943. S42 adds realistic weapon stats, realistic gameplay ( like fuel and ammo consumption ) and historical units to the game, while it mostly removes the teching and upgrade aspect. The Mod also features unique summer and winter maps and skins, adds some more units to the soviet factions ( like early T-34, BA-10 or T-26 )and supplies the germans with units like Flakpanzer I, early StuG IIIs or StuIG 33
The Sturminfanteriegeschütz 33B (Aussault Infantry Gun) was an ad-hoc solution to fullfill the need for an armored assault weapon in Stalingrad. The sIG 33 was mounted in a casemate on the Pz III chassis. Only 24 were built, the first 12 were sent to Stalingrad, the others came too late, the pocket was already closed. They took part in the release attempt "Operation Winter Storm", some of them saw service until 1944.
**** yeah, one of my favourite vehicles of wehrmacht!