The Office of Naval Operations created a code identifying Advance Base (AB) construction as a numbered metaphor for the size/type of base. That code was also used to identify the "unit" that would be the administration for that base. These were Lion, Cub, Oak and Acorn with a Lion being a main Fleet Base (numbered 1–6). Cubs were Secondary Fleet Bases 1/4 the size of a Lion (numbered 1–12). Oak and Acorn were the names given air installations, new or captured (airfield or airstrip). Cubs quickly gained status. The speed with which the Seabees could make one operational led the Marines to consider them a tactical component. Camp Bedilion shared a common fence-line with Camp Rousseau at Port Hueneme and was home to the Acorn Assembly and Training Detachment (AATD) When the code was first created, BuDocks foresaw two CBs constructing a Lion. By 1944 an entire Regiment was being used. The invasion of Okinawa took four Construction Brigades of 55,000 men. The Seabees built the infrastructure needed to take the war to Japan. By war's end CBs had, served on six continents, constructed over 300 bases on as many islands. They built everything: airfields, airstrips, piers, wharves, breakwaters, PT & seaplane bases, bridges, roads, com-centers, fuel farms, hospitals, barracks and anything else.