When CBs were created the Marine Corps wanted one for each of the three Marine Divisions, but were told no because of war priorities. Even so, early Seabee units were connected with Marine Corps ops. The 1st Naval Construction Detachment (Bobcats) together with and A Co CB 3 was transferred to the Marines and redesignated 3rd Battalion 22nd Marines. The Bobcats had deployed without receiving advanced military training. The 22nd Marines took care of that. The 4th Construction Detachment was attached to the 5th Marine Defense Battalion for two years.