USS William J. Pattison (APD-104)

Following shakedown training out of Guantanamo Bay, Cuba, and amphibious training at Hampton Roads, Virginia, William J. Pattison underwent post-shakedown repairs at the Portsmouth Navy Yard in Kittery, Maine, between 20 April 1945 and 27 April 1945.

On 27 April 1945, William J. Pattison departed Portsmouth, New Hampshire, bound for New York City. There she rendezvoused with the transport USS General William Weigel (AP-119), and the two ships got underway on 1 May 1945 and headed for the West Indies. After a stop at San Juan, Puerto Rico, from 4 May 1945 to 8 May 1945, the two ships continued on to the Panama Canal Zone, where they arrived on 10 May 1945. William J. Pattison transited the Panama Canal on 12 May 1945 and set course for San Diego, California. Diverted en route in order to provide emergency medical treatment to an appendicitis victim on board a Liberty ship, she did not reach San Diego until 22 May 1945.

William J. Pattison remained at San Diego only two days before putting to sea on 24 May 1945 in company with high-speed transports USS Begor (APD-127) and USS Cavallaro (APD-128). After a six-day voyage filled with gunnery drills and tactical exercises, the three high-speed transports arrived in Pearl Harbor, Territory of Hawaii, on 30 May 1945. William J, Pattison spent the next two weeks in amphibious and underwater demolition team training in Hawaiian waters, mostly at Maui.

On 13 June 1945, William J. Pattison embarked 10 officers and 50 enlisted men and got underway for the Marshall Islands, in company with Cavallaro and SS Cape Meares. The three ships entered the lagoon at Eniwetok on 21 June 1945, but on 23 June 1945 got underway again with a convoy bound for Ulithi Atoll in the Caroline Islands. William J. Pattison remained at Ulithi from 26 June 1945 to 1 July 1945, when she began the two-day voyage to Leyte in the Philippine Islands. After eight days at Leyte, she headed back to Ulithi Atoll on 12 July 1945.

In late July and early August 1945, William J. Pattison made two voyages from Ulithi Atoll to Okinawa. Though both visits were somewhat enlivened by air raid alerts, she saw no action. The surrender of Japan which ended World War II on 15 August 1945 found the ship on her way from Okinawa to the Mariana Islands.

William J. Pattison arrived at Guam in the Marianas on 17 August 1945 and embarked Underwater Demolition Team 18. On 20 August 1945, she departed Guam in company with Begor and a group of tank landing ships (LSTs) to join the United States Third Fleet off Japan. William J. Pattison and Begor soon parted company with the slower LSTs and made the rendezvous with the Third Fleet on the night of 24–25 August 1945.

USS William J. Pattison (right) alongside the Japanese battleship Nagato in Tokyo Bay in September 1945.

William J. Pattison arrived in Tokyo Bay late in the afternoon of 27 August 1945 to begin her part in the postwar occupation of Japan. On 30 August 1945, she supported the United States Marines who occupied Yokosuka Naval Base, and her underwater demolition team unit carried out an inspection of the base's harbor facilities. Later, she participated in the demilitarization of captured Japanese warships. For the next month, William J. Pattison steamed among various Japanese bases located throughout the Japanese Home Islands, reconnoitering to prepare for their occupation by United States Marine Corps, United States Army, or U.S. Navy men. She also helped with further demilitarization projects.

On 30 September, the ship got underway on the first leg of her journey back to the United States. After stops at Guam, Eniwetok, and Pearl Harbor, she arrived back in San Diego on 22 October 1945.

William J. Pattison remained active with the Amphibious Forces, United States Pacific Fleet, into early 1946, when she moved to Green Cove Springs, Florida.