In February 1943, after the "Afrika Korps" had been driven into Tunisia, the Germans took the offensive and pushed through the Kasserine Pass before being stopped with the help of both Ninth and Twelfth Air Force units in the battle. The Allies drove the enemy back into a pocket around Bizerte and Tunis, where Axis forces surrendered in May. Thus, Tunisia became available for launching attacks on Pantelleria (Operation Corkscrew), Sicily (Operation Husky), and mainland Italy.