A limited counter-attack (codenamed Operation Solstice) by the newly created Army Group Vistula, under the command of "Reichsführer-SS" Heinrich Himmler, had failed by 24 February, and the Red Army drove on to Pomerania and cleared the right bank of the Oder River. In the south, the German attempts, in Operation Konrad, to relieve the encircled garrison at Budapest failed and the city fell on 13 February. On 6 March, the Germans launched what would be their final major offensive of the war, Operation Spring Awakening, which failed by 16 March. On 30 March the Red Army entered Austria and captured Vienna on 13 April.