At the start of 1944, "Pennsylvania" was at Pearl Harbor; over the course of the first two weeks of January, she took part in maneuvers in preparation for landings on Kwajalein in the Marshall Islands. She departed Pearl Harbor on 22 January in company with the invasion fleet, and on 31 January she began her preparatory bombardment of the atoll to start the Battle of Kwajalein. Troops went ashore the next day, and "Pennsylvania" remained offshore to provide artillery support to the marines as they fought to secure the island. By the evening of 3 February, the Japanese defenders had been defeated, allowing the ship to depart to Majuro Atoll to replenish her ammunition supply. She left shortly thereafter, on 12 February, to support the next major attack on Eniwetok in the Marshalls; five days later she arrived off the island, the Battle of Eniwetok already underway, and over the course of 20 and 21 February, she shelled the island heavily to support the men fighting ashore. On 22 February, she supported the landing on Parry Island, part of the Eniwetok atoll.