On February 19, 1945, 2nd Battalion, 24th Marines landed on Iwo Jima and fought for 35 days until the island was finally secured on March 26, 1945. From D-day until the 24th RCT relieved the 25th RCT the Seabees of the 133rd NCB were the 2nd Battalions Shore party. The Battalion was awarded a second Presidential Unit Citation for its participation in the capture of Iwo Jima. Captain Joseph J. McCarthy, Commanding Officer, Co. G, 2nd Battalion, 24th Marines, and a Chief in the Chicago Fire Department, was awarded the Medal of Honor for his gallantry during the battle. The battalion was demobilized on October 31, 1945.