During WW2, the U.S. Navy implements a new idea of forming construction battalions that also are fighting units, in case of Japanese attack.

Construction workers in World War II in the Pacific are needed to build military sites, but the work is dangerous and they doubt the ability of the Navy to protect them. After a series of attacks by the Japanese, something new is tried, Construction Battalions (CBs=Seabees). The new CBs have to both build and be ready to fight.—John Vogel <[email protected]>