Pennsylvania

History: The Pennsylvania class consisted of two super-dreadnought battleships built for the United States Navy just before the First World War. The ships were named Pennsylvania and Arizona, after the American states of the same names. They constituted the United States' second battleship design to adhere to the "all or nothing" armor scheme, and were the newest American capital ships when the United States entered the First World War.

The Nevada-class battleships represented a marked increase in the United States' dreadnought technology, and the Pennsylvania class was intended to continue this with slight increases in the ships' capabilities, including two extra 14-inch (360 mm) guns and improved underwater protection. The class was the second standard type battleship class to join the United States Navy, along with the preceding Nevada and the succeeding New Mexico, Tennessee and Colorado classes.

In service, the Pennsylvania class saw limited use in the First World War, as a shortage of oil fuel in the United Kingdom meant that only the coal-burning ships of Battleship Division Nine were sent. Both were sent across the Atlantic to France after the war for the Paris Peace Conference of 1919, and were then transferred to the Pacific Fleet before being significantly modernized from 1929 to 1931. For the remainder of the inter-war period, the ships were used in exercises and fleet problems. Both Pennsylvania and Arizona were present during the Japanese attack on Pearl Harbor. Arizona was sunk in a massive magazine explosion and was turned into a memorial after the war, while Pennsylvania, in dry dock at the time, received only minor damage. After a refit from October 1942 to February 1943, Pennsylvania went on to serve as a shore bombardment ship for most of the remainder of the war, an exception being the October 1944 Battle of Surigao Strait, the last battle ever between battleships. Pennsylvania was severely damaged by a torpedo on 12 August 1945, the day before the cessation of hostilities. With minimal repairs, she was used in Operation Crossroads, part of the Bikini atomic experiments, before being expended as a target ship in 1948.

Type: Battleship

Primary Country: The U.S. is a country of 50 states covering a vast swath of North America, with Alaska in the northwest and Hawaii extending the nation’s presence into the Pacific Ocean. Major Atlantic Coast cities are New York, a global finance and culture center, and capital Washington, DC. Midwestern metropolis Chicago is known for influential architecture and on the west coast, Los Angeles' Hollywood is famed for filmmaking.