BatDiv

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.

At the time of the Pearl Harbor Attack, Pennsylvania was in dry dock and Colorado was being refitted at Bremerton Navy Yard, Washington.

After the Pearl Harbor attack, the BATDIV was replaced by the Task Group (TG) as the operational wartime unit.

Moreover, a Battleship Division could function in the operational chain of command, for example at the Battle of Surigao Strait, where BATDIV FOUR (Maryland, Mississippi and West Virginia) and BATDIV TWO (Pennsylvania, Tennessee and California) operated as units under BATFOR (Battleship Force) SEVENTH FLEET; Commander, Battle Force (COMBATFOR) Rear Admiral Oldendorf, was overall commander of the Surigao force (Task Group 77.2).

This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.