Complex sentence: For the remainder of the war, Kraemer served as a chief of staff with the 6th Panzer Army and surrendered to the U.S. Army, along with Dietrich, in May 1945.
Split into simpler sentences: For the remainder of the war, Kraemer served as a chief of staff with the 6. Panzer-Armee and surrendered to the Americans, along with Dietrich, in May 1945.