The 8.8cm Bunkerflak SP guns were issued to the 8th Heavy Tank-hunter Battalion. They fought in Poland in 1939 and then France in 1940, supporting the 1st and 2nd Panzer Divisions. They engaged French tanks (including the heavy Char B) on several occasions, losing two vehicles in the process. The 8th Heavy Tank-hunter Battalion was attached to the 39th Army Corps for the invasion of Russia in 1941. Then, in mid-1942, the four surviving vehicles joined the 521st Heavy Tank-hunter Battalion, fighting in the Caucasus alongside the last surviving Dicker Max and the two Sturer Emil heavy tank-hunters