Triumph sailed put of the lagoon at Ulithi with the Ryukyu Islands invasion force. When she arrived at her destination early on the morning of the 24th, Triumph and her division mates joined the and a patrol craft in minesweeping operations. On the 26th, the destroyer struck a mine, and it caused explosions in her forward magazine which ripped off most of her forward section. Two ships of Triumph's unit proceeded to assist the stricken warship but managed to rescue only 172 members of Halligan's 325-man complement. The following day, the division swept 15 mines of which Triumph claimed three. On the 28th, her formation endured its first air raid of the campaign when three enemy planes dived in to attack. The formation shot all three done. The minesweeper continued sweeping operations through the end of the month. She and her colleagues concluded their mission on the eve of the landings, 31 March, and began duty with the task force's antisubmarine screen. At 0600 the following morning — April Fool's Day and Easter Sunday rolled into one — landing craft started their move shoreward; and, soon thereafter, the first wave of U.S. Marines and soldiers hit the beaches on Okinawa. Screening for kamikazes During the ensuing four months, Triumph alternated screening duties with minesweeping operations. On several occasions during that time, she became directly involved in the incessant air attacks launched by the Japanese against the invasion force. On 16 April, when received a kamikaze hit, Triumph was soon at hand to rescue three men blown overboard in the action. The minesweeper herself almost required such assistance on the 18th when a Nakajima B5N torpedo bomber apparently tried to crash into her. Near sunset, he came in from astern up the port side, passed under her port yardarm, and splashed down not far from Triumph. The air raids continued, but their primary targets remained the radar picket destroyers. Consequently, Triumph experienced few actual surface-to-air engagements. On 11 May, while she patrolled off Ie Shima, she brought two enemy planes under fire but could not definitely claim credit for the one splashed by antiaircraft fire. Combat air patrol accounted for the other one. Between mid-May and mid-June, she executed her patrols and sweeps under relatively calm circumstances. Under attack by a torpedo plane On 15 June, however, she experienced another potentially fatal adventure. At dusk, Triumph was patrolling north of Kerama