This was to be the case for both towed and mobile tank destroyer battalions. I was used as the base for the Elefant tank destroyer. It is classified as a tank destroyer. The maneuvers tested the concept of the tank destroyer. Nevertheless, in November Marshall authorized creation of a tank destroyer force. This type was usually issued to early tank destroyer units. It then served in North Africa in tank destroyer battalions. The 703rd Tank Destroyer Battalion began reequipping on . The suspension was the same as on the "Elefant" tank destroyer. The new vehicle was to be used primarily in a tank destroyer role. The ISU-152 could also operate as an effective heavy tank destroyer. The conclusion drawn was that tank destroyer battalions should be raised. The six prototype tank destroyer vehicles were also used operationally. Patrick F. Cassidy and four tank destroyers of the 705th Tank Destroyer Battalion. Kang was able to hold his 12th Regiment and tank destroyer battalion in reserve.