The Semovente da 75/18 was an Italian self-propelled gun of the Second World War. It was built by mounting the 75 mm Obice da 75/18 modello 34 mountain gun on the chassis of a M13/40, M14/41 or M15/42 tank. The first 60 were built using the M13/40 chassis and a subsequent 162 were built on the M14/41 chassis from 1941 to 1943, when the M15/42 chassis were introduced. The Semovente da 75/18 was intended to be an interim vehicle until the heavier P40 tank could be available.
After the Italian surrender in 1943, some 131 Semovente da 75/18 were seized by the Germans and the production of another 55 was authorized. They were, in combination with other Semovente models, issued to 12 divisions (9 infantry, one mountain, one Jäger and one Grenadier) and 3 assault-gun brigades as well as to the 12th SS Polizei Panzer Company. All units were intended for service in Italy or the Balkans. They were designated StuG M42 mit 7,5 KwK L 18(850)(i).