<sod>The Soviets experimented with truck-and tank-based self-propelled weapons, producing a few Komsomoletz tractor-mounted 57-mm [[ZiS-2]] guns early in the war. By 1943, the series of ''[[Samokhodnaya ustanovka]]'' casemate-armored vehicles had started to appear at the front, starting with the [[SU-85]], and by late 1944 the [[SU-100]], which mounted powerful guns on modern chassis adopting the full-casemate enclosure of the crew compartment as the Germans had done with the StuG III. These had the advantage of being relatively cheap to build and mounting a larger gun compared to the conventional tank that they were derived from, but at the expense of flexibility.<eod>
<sod>The Soviets experimented with truck-and tank-based self-propelled weapons, producing a few Komsomoletz tractor-mounted 57-mm [[ZiS-2]] guns early in the war. By 1943, the series of ''Samokhodnaya ustanovka'' casemate-armored vehicles had started to appear at the front, starting with the [[SU-85]], and by late 1944 the [[SU-100]], which mounted powerful guns on modern chassis adopting the full-casemate enclosure of the crew compartment as the Germans had done with the StuG III. These had the advantage of being relatively cheap to build and mounting a larger gun compared to the conventional tank that they were derived from, but at the expense of flexibility.<eod>