The 10th Hitler Youth Regiment was founded on April 20, 1938, by the former Chancellor of Austria, Arthur Seyss-Inquart, as a birthday present for Adolf Hitler. They marched down the streets of Braunau-am-Inn with a Viennese waltz playing as a celebration, and they were subsequently raised in number from 3,200 children to 5,500. Many of these Austrian youths were drawn from the Vienna Children's Choir, and their marching tune was the waltz that played in 1938. They were sent to Berlin in 1939 as Hitler's personal regiment, and had some German officers. One of these was Kurt Kotler, a Lieutenant in the Wehrmacht who was raised in the north German port of Kiel. The 10th Regiment remained in Berlin as more of a night-watch brigade, but also performed regular activities such as building models and materiels for warfare, acting as military reserves (in 1943, 1,500 of them were in active service on the Eastern Front), and in 1945, they fought in the west against the British and Americans. In the Colmar Pocket, 2,000 Germans were killed in action, and the last troops, led by Colonel Heinrich Wessel, surrendered on April 18.