The original Naval Construction Battalion 133 was commissioned at Camp Perry, Williamsburg, Virginia in 1943. They rebuilt the air station, docks and more in Hawaii and then they moved onto Iwo Jima landing with the first waves, suffering the largest casualties of any Seabee unit in history. The invasion of Iwo Jima began on February 19, 1945. Its important to remember, given time change and the international date line, the first waves started landing February 18th, 1945 around 7pm EST. They have yet to receive the Presidential Unit Citation for their bravery on Iwo Jima.