She reached Apra Harbor, Guam, on 22 March, transferred landing craft to the Pacific Amphibious Forces Replacement Boat Pool, and embarked additional marines. Pushing on via Eniwetok, the ship reached Pearl Harbor on 4 April. After disembarking the marines at Kahului on Maui, she returned to Pearl Harbor on 7 April and devoted the next few days to ship's work and taking on fuel, water, and supplies. She got underway again on 20 April for a week of intensive amphibious exercises at Maalea Bay, Maui. Another few days back at Pearl Harbor followed, and then "Beckham" shifted to Honolulu harbor on the morning of 4 May. There, she embarked several Army units and sailed on 8 May for the Marshalls in convoy PD-399T. "Beckham" fueled at Eniwetok before resuming her voyage on 20 May. Reaching Ulithi on 24 May, "Beckham" and her passengers awaited orders which finally came on 20 June. Underway that day, she headed for the Ryūkyūs in convoy WOK-27, arrived off Okinawa's Hagushi beachhead on the afternoon of 24 June, and commenced disembarking troops and unloading cargo. Kamikaze attacks posed a serious threat to the "fleet that came to stay" as it supported the conquest of Okinawa. That evening, she went to general quarters and started her smoke generators as part of an effort to blanket the area with a chemical fog to conceal the fleet. The next night, "Beckham" again set Condition I watches; and, at 0030 on the 26th, a kamikaze crashed into the sea close aboard the amphibious command ship , 1,000 yards off "Beckham's" starboard beam. "Beckham" weighed anchor on 28 June and joined convoy OKS-10, bound for the Marianas. Arriving at Saipan on 2 July, she disembarked casualties from Okinawa. Then, after taking on Army and Army Air Force men bound for Pearl Harbor, she got underway for Hawaii. After her escort was detached on the 10th, "Beckham" zig-zagged her way to Pearl Harbor where she arrived on the 13th. Shifting to Honolulu on the 23d, the attack transport embarked passengers and loaded cargo and stores before getting underway for Eniwetok on 26 July. Ending the first leg of this voyage to the western Pacific on 3 August, "Beckham" sailed with task unit TU 96.6.17 and reached Ulithi on the 8th.