of the Führungsstab) an office that replaced Quartermaster General I. On 13 February 1945, after a long argument, Guderian persuaded Hitler to make Wenck chief of staff of Army Group Vistula (with the power to launch an attack) under Himmler. Wenck's attack was initially successful, but Hitler requested him to attend daily Führer's briefings which forced him to make a daily round trip of 200 miles. On February 17, 1945, an extremely tired Wenck took the driving wheel from his driver Dorn who had collapsed. Wenck then fell asleep at the wheel and crashed his car off the road. Saved by Dorn, he ended up in the hospital with a fractured skull and five broken ribs. Meanwhile, the attack failed. On 10 April 1945, Wenck was appointed commander of the German Twelfth Army located to the west of Berlin to guard against the advancing American and British forces. But, as the Western Front moved eastwards and the Eastern Front moved westwards, the German armies making up both fronts backed towards each other. As a result, the area of control of Wenck's army to his rear and east of the Elbe River had become a vast refugee camp for Germans fleeing from the approaching Soviet Army. Wenck took great pains to provide food and lodging for these refugees. At one stage, the Twelfth Army was estimated to be feeding more than a quarter of a million people every day. Battle of Berlin On 21 April, Adolf Hitler ordered Waffen SS Obergruppenführer Felix Steiner to attack the forces of Soviet Marshal Georgy Zhukov's 1st Belorussian Front. Zhukov's forces were encircling Berlin from the north, while the forces of Soviet Marshal Ivan Konev's 1st Ukrainian Front were encircling from the south. Steiner was to attack Zhukov with his Army Detachment Steiner. With few operational tanks and roughly a division's worth of infantry, Steiner requested that his "army" be allowed to retreat instead of attacking. On 22 April, as Steiner retreated, Wenck's Twelfth Army became Hitler's last hope to save Berlin. Wenck was ordered to disengage the Americans to his west and, attacking to the east, link up with the Ninth Army of General der Infanterie Theodor Busse. Together, they would attack the Soviets encircling Berlin from the west and from the south. Meanwhile, the XLI Panzer Corps under General Rudolf Holste would attack the Soviets from the north. Wenck's forces attacked towards Berlin,