From: Fife Scotland
World War I and prior BatDivs existed from at least 1913, when there were four Battleship Divisions in the US Atlantic Fleet. By April 1917, with the American entry into World War I, there were at least nine Battleship Divisions, as BatDiv 9 was dispatched to operate with the Royal Navy's Grand Fleet. Inter-War period Before the Second World War, the U.S. Navy battleship force was organized into five Battleship Divisions of three battleships each. Only two of these BATDIVs were composed of three battleships of the same class, but mixing battleships of separate two-ship classes to form three-ship BATDIVs was facilitated by the "Standard type battleship" concept of the US Navy, a design concept developed before 1922 calling for uniform top speed of 21 knots (39 km/h) and a tight tactical radius of 700 yards (640 m) for all battleships of the Nevada, Pennsylvania, New Mexico, Tennessee and Colorado classes. Battleship Division 1 USS Pennsylvania USS Arizona USS Nevada Battleship Division 2 USS Tennessee USS California USS Oklahoma Battleship Division 3 USS New Mexico USS Mississippi USS Idaho Battleship Division 4 USS Colorado USS Maryland USS West Virginia Battleship Division 5 USS New York USS Texas USS Arkansas
Stationed at Pearl Harbor as part of the U.S. Pacific Fleet were three battleship divisions; BatDiv 1, 2 and 4. These nine battleships were intended to counterbalance the ten capital ships of the Imperial Japanese Navy. At the time of the Pearl Harbor Attack, Pennsylvania was in dry dock and Colorado was being refitted at Bremerton Navy Yard, Washington. Arizona was mated with Nevada and Oklahoma at that time. The U.S. Atlantic Fleet contained BatDiv 3 and 5. BatDiv3 had been part of the Pacific Fleet until 20 May 1941 when its three ships were transferred to the Atlantic Fleet for Neutrality Patrol duty. BatDiv 5 was a training division consisting of three older battleships. An additional BATDIV (BatDiv 6) was attached to the Atlantic Fleet during 1941; this consisted of the new battleships North Carolina and Washington, both of which were in the process of undergoing post-commissioning work up.
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