Operation Spring Awakening (6 March 1945 – 16 March 1945) was the last major German offensive launched during World War II. It began in great secrecy on 6 March 1945. The German forces launched attacks in Hungary near Lake Balaton. This area included some of the last oil reserves still available to the Axis. The operation involved many German units withdrawn from the failed Ardennes Offensive on the Western Front, including the 6th SS Panzer Army and the LSSAH. Operation Spring Awakening was a failure for the German side. Within a week, the early gains were halted by massive counter-attacks by Soviet forces. The overwhelming numerical superiority of the Red Army made any defense impossible, yet Hitler somehow had believed victory was attainable.