Nixon was appointed as the 2nd Battalion intelligence officer (S2). He and the 506th parachuted into Normandy on June 6, 1944. Shortly after Easy Company fought in the Battle of Carentan on June 12, 1944, he was moved up to the regimental level as the 506th S2. He served in the Netherlands, Belgium, and Germany. In the Netherlands he was hit by a bullet from a German MG 42 machine gun. The bullet went through his helmet, grazed his forehead, and left a small burn mark. He developed a drinking problem, and was eventually removed and assigned back down to the 2nd Battalion as the operations officer (S3), where he continued to display his skill at planning and operations, but did not have to deal with the politics and high visibility at the regimental level. In Berchtesgaden, he had first choice of a captured, extensive wine collection originally assembled at Hermann Göring's orders, comprising bottles which were stolen from wineries across France and other European occupied territories.