In March 1945, after the fall of Budapest, the 6th Panzer Army launched one of the final German offensives of the war, Operation Frühlingserwachen around Lake Balaton. This was an attempt to protect the last sources of petroleum controlled by the Germans. The offensive lacked operational surprise, but Soviet Front commander Fyodor Tolbukhin's awareness of the presence of elite SS units, under direct orders from STAVKA Tolbukhin was ordered to use minimal forces against the SS until a counteroffensive could be made in strength north of Lake Balaton. On March 16 the 3rd Ukrainian Front launched its major counteroffensive and Joseph Goebbels admitted in his diary that failure was likely. Three days later, the Germans were thrown back at their original starting positions. The 1st, 2nd, 9th, and 12th SS Panzer Divisions were reduced to 31 operational armored fighting vehicles by March 15, 1945, while Army Group South as a whole retained 772 operational tanks and assault guns as of March 16, 1945.