"Pennsylvania" joined the fleet in a series of amphibious operations, primarily tasked with providing gunfire support. The first of these, the Aleutian Islands Campaign, took place in mid-1943, and was followed by an attack on Makin later that year. During 1944, she supported the landings on Kwajalein and Eniwetok in the Marshall Islands and the Mariana and Palau Islands campaign, including the Battles of Saipan, Guam, Peleliu, and Battle of Angaur. During the Philippines campaign, in addition to her typical shore bombardment duties, she took part in the Battle of Surigao Strait, though due to her inadequate radar, she was unable to locate a target and did not fire. During the Battle of Okinawa, she was torpedoed by a Japanese torpedo bomber and badly damaged, forcing her to withdraw for repairs days before the end of the war.