The battles on the Russian Front in 1941 revealed the complete obsolescence of light, machine gun armed tanks, against their Russian counterparts. As a commander of one of the panzer groups said, "A tank equipped with a gun less than 75 mm has no chance of survival on the Eastern Front." By 1942 the PzKfw 1A and 1B had been withdrawn from frontline service. A number of these vehicles were converted to ammunition tractors. This was accomplished by removing the turret and adding a simple metal box atop the superstructure. 12 of these vehicles are known to have seen service with the 1st SS Division, "Leibstandarte SS Adolf Hitler"