Budapest fell on 13 February. Hitler ordered Dietrich's 6th Panzer Army to move into Hungary to protect the Nagykanizsa oilfields and refineries, which he deemed the most strategically valuable fuel reserves on the Eastern Front. "Frühlingserwachsen" (Operation Spring Awakening), the final German offensive in the east, took place in early March. German forces attacked near Lake Balaton, with 6th Panzer Army advancing north towards Budapest and 2nd Panzer Army moving east and south. Dietrich's forces at first made good progress, but as they drew near the Danube, the combination of muddy terrain and strong Soviet resistance brought them to a halt. By 16 March the battle was lost. Enraged by the defeat, Hitler ordered the Waffen-SS units involved to remove their cuff titles as a mark of disgrace. Dietrich refused to carry out the order.