Battle of Iwo Jima

On 5 February, Vicksburg got underway, bound for Saipan in the Mariana Islands, which she reached eight days later. While there, she refueled from the oiler Enoree as the fleet made preparations for the upcoming invasion of Iwo Jima. Vicksburg was assigned to TG 52.19, which sortied on 14 February. The next day, Vicksburg was transferred to Task Unit 54.9.2., part of the shore bombardment unit. It included the old dreadnought battleships Nevada and Idaho, the heavy cruisers Chester and Pensacola, and several destroyers. Vicksburg, Chester, and Pensacola took up their positions at 06:51 the next morning, and at 07:09, Vicksburg launched one of her Vought OS2U Kingfisher seaplanes to help direct her fire. Firing at a range of about 12,000 yd (11,000 m), the ship took Japanese positions on the north side of Iwo Jima under fire. Poor weather hampered the aircrews' ability to observe the ship's fire, but Vicksburg nevertheless carried out the bombardment for almost an hour, ceasing fire at 08:08.^[4]

After recovering and refueling her Kingfisher, Vicksburg resumed her bombardment at 09:47, but low visibility still interfered. During a third bombardment later that day, the heavy cloud cover dissipated and permitted much more effective shooting. During this period, at 14:14, a Japanese A6M5 Zero attacked Vicksburg's spotter, but another Kingfisher from Pensacola shot the Japanese fighter down, allowing Vicksburg's aircraft to continue supporting the cruiser. At around 14:45, the ship ceased fire again and recovered her Kingfisher. A fourth and final bombardment mission began at 16:18 and concluded at 17:27. Vicksburg and the rest of TG 52.19 departed for the evening. The ships continued to operate off Iwo Jima more than two weeks, providing fire support to the marines fighting to occupy the island.^[4] Later that month, Vicksburg was detached to form Task Unit 58.1.22 along with her sister ships Miami and Vincennes, the cruiser San Diego, and fifteen destroyers. The unit carried out a raid on the island of Okidaitōjima on 2 March.^[5] the On 5 March, Vicksburg left for the fleet's base at Ulithi to replenish ammunition and stores. While there, she was transferred to Task Force 58, the fast carrier task force, and was assigned to TG 58.1, one of the subordinate carrier battle groups. The task force sortied on 14 March to carry out air strikes in preparation for the upcoming invasion of Okinawa.^[4]

Okinawa campaign and end of the war

In the early hours of 18 March, as the carriers began their attacks on Japanese positions in the home islands, a Japanese Mitsubishi G4M1 bomber attempted a torpedo attack on Vicksburg. The cruiser turned away, narrowly avoiding the torpedo by around 35 yd (32 m). Another Japanese aircraft dropped flares nearby about twenty minutes later before being driven off by anti-aircraft fire from the American fleet; shortly thereafter, it passed back through the American formation and was shot down by the combined fire of several ships, including Vicksburg. Further Japanese attacks took place through the morning. A Yokosuka P1Y land-based bomber attempted to dive on one of the carriers, but was shot down by heavy American fire. Some two hours later, a Yokosuka D4Y dive bomber flew over Vicksburg; the cruisers' light gunners scored three hits before the aircraft was shot down by 5-inch fire from other vessels—potentially Miami or the destroyer Harrison—brought the aircraft down. Over the following days, the American carriers struck many targets in Japan, prompting heavy Japanese counter-attacks. During this period, Vicksburg shot down a total of eight Japanese aircraft. She also used her Kingfisher to recover an American pilot who had been shot down off the Japanese coast.^[4]

When the invasion of Okinawa began on 1 April, Vicksburg returned to coastal bombardment duties. The ship supported the American advance across the southern half of the island, targeting defensive strongpoints, fortified caves, and other defensive positions. She fired thousands of rounds from her 6-inch and 5-inch batteries, at times engaging Japanese positions a few hundred yards from American positions.^[4] She nevertheless remained attached to TG 58.1 during the campaign.^[6] In the final stage of the fighting on Okinawa, Vicksburg was detached to escort minesweepers clearing Japanese minefields in the East China Sea. These operations concluded on 24 June, and Vicksburg thereafter went to the Philippines.^[4] In mid-July, Vicksburg was assigned to TG 95.7, along with the old battleships Arkansas and Texas, two other cruisers, and several destroyers. The unit, part of TF 95, was used to patrol off Okinawa and make raids into the East China Sea to interdict Japanese shipping in the area, though Vicksburg saw no serious action during this period. In early August, Vicksburg joined the escort for the carriers Intrepid and Cabot, along with the cruiser Mobile and several destroyers, for a raid on Wake Island.^[7]

Vicksburg later returned to the Philippines, where she lay when the Japanese surrendered on 15 August. She then joined Task Unit 30.3.7, which also included the destroyers Moale, Rowe, and Lowry, which sortied on 20 August, bound for Japan. The ships rendezvoused with the fast carrier strike force, which had by then passed to 3rd Fleet command and been re-numbered TF 38, and on 24 August, Vicksburg was assigned to TG 38.2. The unit remained outside Tokyo Bay in late August and into September, where the formal surrender ceremony was carried out aboard the fast battleship Missouri on 2 September. Vicksburg and the rest of the task group then entered the bay on 5 September. The cruiser became the flagship of Cruiser Division 10, commanded by Rear Admiral Lloyd J. Wiltse. Vicksburg and other elements of TF 38 departed for Okinawa on 20 September, where the ship embarked some 2,200 passengers bound for the United States.^[4]

Over the course of the ship's participation in World War II, Vicksburg earned two battle stars.^[4]