The fourth Essex (CV-9) was launched 31 July 1942 by Newport News Shipbuilding and Dry Dock Co. sponsored by Mrs. Artemus L. Gates, wife of the Assistant Secretary of the Navy for Air; and commissioned 31 December 1942, Captain D. B. Duncan command ing. She was reclassified (CVA-9) on 1 October 1952, and (CVS-9) on 8 March 1960.
Following her shakedown cruise Essex sailed to the Pacific in May 1943 to begin a succession of victories which would bring her to Tokyo Bay. Departing Pearl Harbor, she participated with Task Force 16 (TF 16) in carrier operations against Marcus Island (31 Aug ust 1943); was designated flagship of TF 14 and struck Wake Island (5-6 October); launched an attack with Task Group 50.3 (TG 50.3) against the Gilbert Islands where she also took part in her first amphibious assault, the landing on Tarawa (18-23 November).
Refueling at sea, she cruised as flagship of TG 50.3 to attack Kwajalein (4 December). Her second amphibious assault delivered in company with TG 58.2 was against the Marshalls (29 January-2 February 1944).
Essex in TG 68.2 now joined with TG 58.1 and 58.3, to constitute the most formidable carrier striking force to date, in launching an attack against Truk (17-18 February 1944) during which eight Japanese ships weresunk. En route to the Marianas to sever Japanese supply lines, the carrier force was detected and received a prolonged aerial attack which it repelled in a businesslike manner and then continued with the scheduled attack upon Saipan, Tinian and Guam (23 February).
After this operation Essex proceeded to San Francisco for her single wartime overhaul. She then joined carriers USS Wasp (CV-18) and USS San Jacinto (CVL-30) in TG 12.1 to strike Marcus Island (19-20 May 1944) and Wake (23 May). She deployed with TF 58 to support the occupation of the Marianas (12 June-10 August); sortied with TG 38.3 to lead an attack against the Palau Islands (6-8 September), and Mindanao (9-10 September) with enemy shipping as the main target, and remained in the area to supp ort landings on Peleliu. On 2 October 1944, she weathered a typhoon and 4 days later departed with TF 38 for the Ryukyus.
For the remainder of 1944 she continued her frontline action, participating in strikes against Okinawa (10 October), and Formosa (12-14 October), covering the Leyte landings, taking part in the battle for Leyte Gulf (24-25 October), and continuing the search for enemy fleet units until 30 October when she returned to Ulithi, Caroline Islands, for replenishment.
She resumed the offensive and delivered attacks on Manila and the northern Philippine Islands during November. On 25 November, for the first time in her far-ranging operations and destruction to the enemy, Essex received injury. A kamikaze hit the port edge of her flight deck landing among planes gassed for takeoff, causing extensive damage, killing 15, and wounding 44. 
This "cramped her style" very little. Following quick repairs we find with 3d Fleet off Luzon supporting the occupation of Mindoro (14-16 December). She rode out the typhoon of 18 December 1944 and made special search for survivors afterwards.
With TG 3 8.3 she participated in the Lingayen Gulf operations, launched strikes against Formosa, Sakishima, Okinawa, and Luzon. Entering the South China Sea in search of enemy surface forces, the task force pounded shipping and conducted strikes on Formosa, the China coast, Hainan, and Hong Kong. Essex withstood the onslaught of the third typhoon in four months (20-21 January 1945) before striking again at Formosa, Miyako Shima and Okinawa (26-27 January).
During the remainder of the war she operated with TF 58, conducting attacks against the Tokyo area (16-17, and 25 February) both to neutralize the enemy's airpower before the landings on Iwo Jima and to cripple the aircraft manufacturing industry. She sent support missions against Iwo Jima and neighboring islands, but from 23 March to 28 May 1945 was employed primarily to support the conquest of Okinawa.
In the closing days of the war, Essex took part in the final telling raids against the Japanese home islands (10 July-15 August 1945). Following the surrender, she continued defensive combat air patrols until 3 September when she was ordered to Bremerton, Wash., for inactivation. On 9 January 1947, she was placed out of commission in reserve.
Modernization endowed Essex with a new flight deck, and a streamlined island superstructure, on 16 January 1951 when recommissioned, Captain A. W. Wheelock commanding...(End excerpt. Link follows.) USS Essex CV-9