On 24 May 1944 Zundel assumed command of the 41st Infantry Division Artillery, with the rank of brigadier general. He led this command with distinction in the Battle of Wakde, the Battle of Biak, and the Battle of Mindanao. For Biak, he was awarded oak leaf cluster to his Legion of Merit, and the Silver Star for gallantry in action at Ibdi on 29 May 1944. He was awarded a second oak leaf cluster to his Legion of Merit for the fighting on Mindanao, along with the Bronze Star Medal. He received the Air Medal in July 1945 for flights over enemy territory. These included flights in U.S. Marine Corps Douglas SBD Dauntlesses of VMSB-243.