Army engineers built airfields, roads, bridges, ports, military camps, hospitals, and dozens of other facilities, including the Pentagon completed in 1942. Among the most acclaimed of the combat engineers' achievements were the Alcan Highway, the Ledo and Burma Roads and the clearing of mines and underwater obstacles. The U.S. Army Corps of Engineers supervised the Manhattan Project, the construction of the atomic bomb.

Black crackle Zippo with a U.S. Army Corps of Engineers insignia, a Royal Air Force insignia and a small British coin on both the front and back as well as a small U.S. Army Great Seal insignia on the side.