USS Shamrock Bay (CVE-84) was the thirtieth of fifty Casablanca-class escort carriers built for the United States Navy during World War II.

She was powered with two Skinner Unaflow reciprocating steam engines, which drove two shafts, providing 9,000 horsepower (6,700 kW), thus enabling her to make 19 knots (35 km/h; 22 mph).

During the Invasion of Lingayen Gulf, she carried 20 FM-2 Wildcat fighters, 11 TBM-3 Avenger torpedo bombers, and a TBM-3P photo reconnaissance plane for a total of 32 aircraft.

[6] Shamrock Bay's construction was awarded to Kaiser Shipbuilding Company, Vancouver, Washington under a Maritime Commission contract, on 18 June 1942.

She was launched on 4 February 1944, sponsored by Mrs. James R. Dudley, and then transferred to the Navy for commissioning on 15 March 1944, with Captain Frank Trenwith Ward Jr. in command.

[1][8] Upon being commissioned, Shamrock Bay underwent a shakedown cruise down the West Coast, after which she conducted pilot qualifications until June 1944.

She also took on another load of military passengers back to the East Coast, which consisted mostly of Army Air Corps personnel that had been serving in the China Burma India Theater.

[8] On 27 October, Shamrock Bay had just returned to Norfolk, Virginia, after completing her second transport run, and she was fitting out for anti-submarine operations within the South Atlantic.

Lo in the Battle off Samar, U.S. Navy command found it judicious to dispatch Shamrock Bay as a replacement within the Pacific theater.

Therefore, after taking onboard Composite Squadron (VC) 42 on 11 November, which consisted of twenty-eight aircraft (16 FM-2 Wildcats and 12 TBM-3 Avengers) to be transported to Pearl Harbor, she sailed for the Pacific Ocean, along with Wake Island.

[8] On 31 December, the American fleet departed from Seeadler Harbor, with the escort carriers being placed in Task Group 77.4, under the command of Rear Admiral Calvin T. Durgin, Shamrock Bay and her sister Kitkun Bay were assigned to Rear Admiral Ralph A. Ofstie's Task Unit 77.4.3, the Lingayen Protective Group.

[5] En route, until 8 January 1945, when the American fleet arrived within Lingayen Gulf, the task unit's aircraft contingent provided an air screen for the invasion force as it transited towards north Luzon.

On 13 March, she steamed for the Ryukyu Islands as a part of Task Unit 50.8.13, with the Farragut-class destroyers Dewey and Aylwin providing a physical screen for Shamrock Bay.

[8][14] On 16 April, four of Shamrock Bay's FM-2 fighters were dispatched to help the Allen M. Sumner-class destroyer USS Laffey (DD-724), which was under heavy attack from kamikazes about 50 mi (80 km) north of Okinawa.

The four fighters that Shamrock Bay dispatched shot down six of the threatening kamikazes, but they were forced to withdraw due to the depletion of their fuel and ammunition.

[8] Shamrock Bay remained at station in support of the operations on Okinawa until 11 May, with only a few short interruptions to take on supplies and ammunition at Kerama Retto.

[8] Following the end of the war, Shamrock Bay first made a transport run to Guam, delivering aircraft to the island and then returning vehicles to the West Coast.