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• USS Missouri covered the landings at Okinawa, Japan. ww2dbase [Main Article | CPC]
• USS Cassin Young supported the invasion of Okinawa, Japan. ww2dbase [Main Article | CPC]
• USS Tirante attacked a Japanese landing ship with three torpedoes, but all missed. ww2dbase [Main Article | CPC]
• British Sub Lieutenant R. H. Reynolds's Seafire carrier fighter shot down two A6M5 Zero fighters; these were the first Seafire fighter victories against Zero fighters. ww2dbase [Main Article | CPC]
• US Tenth Army invaded Okinawa, Japan. Japanese aircraft launched a massive counter-attack, damaging USS West Virginia, USS Tennessee, and HMS Indefatigable, among others. ww2dbase [Main Article | TH]
• US First and Ninth Armies complete the encirclement of the Ruhr industrial area at Lippstadt, cutting off the 21 divisions (about 500,000 men) of the German Army Group B. ww2dbase [Main Article | AC]
• US First Army captured Paderborn and Hamm, Germany. ww2dbase [Main Article | TH]
• Soviet 3rd Ukrainian Front captured Wiener Neustadt, occupied Austria. ww2dbase [Main Article | TH]
• American prisoners of war held at Ziegenhain, Germany were liberated by troops of the US 455th Anti-Aircraft Artillery Battalion. ww2dbase [CPC]
• US 158th Regimental Combat Team landed near Legaspi, Luzon, Philippine Islands. ww2dbase [Main Article | CPC]
• Soviet artillery began a 6-day artillery bombardment against Königsberg, East Prussia, Germany. ww2dbase [Main Article | CPC]
• Allied troops captured Doetinchem, Borculo, Eibergen, and Enschede in the Netherlands. ww2dbase [CPC]
• An Ohka special attack mission was launched and damaged USS West Virginia off Okinawa, Japan; on the same day, a cache of 15 Ohka aircraft was captured by the United States Marines on Okinawa, who nicknamed them baka, Japanese for "fool", as the discovery was made on April Fool's Day. ww2dbase [Main Article | CPC]

• British troops commenced Operation Roast across Lake Comacchio in northern Italy. ww2dbase [Main Article | CPC]

• USS Luce patrolled waters off Okinawa, Japan. ww2dbase [Main Article | CPC]
• USS Yorktown (Essex-class) began several days of direct support missions for the troops landing on Okinawa, Ryukyu Islands. About every three days, USS Yorktown (Essex-class) retired east for refueling, rearming, and re-provisioning. ww2dbase [Main Article | Event | DS]
• Light carrier Ryuho entered the drydocks at Kure, Japan for repairs; the repair would be halted shortly after as the damage was judged to be too extensive. ww2dbase [Main Article | Facility | Tabular Record of Movement | CPC]
• Landing ship No. 173 was completed. ww2dbase [Main Article | CPC]
• Crown Prince Yi Un was made a member of the Supreme War Council of Japan. ww2dbase [Main Article | CPC]

• RAF Takali on Malta was transferred from the Royal Air Force to the Fleet Air Arm and was renamed HMS Goldfinch. ww2dbase [Main Article | CPC]

• USS Tunny completed her lifeguard duties off Okinawa, Japan and set sail for US Territory of Hawaii via Midway Atoll. ww2dbase [Main Article | CPC]

• The 11,000-ton Japanese liner Awa Maru, given safe passage by the Americans because she had revealed that she was carrying Red Cross parcels and other aid to Allied POWs, was torpedoed and sunk by American submarine USS Queenfish in the Taiwan Strait after a breakdown in communications. Of the estimated 2,500 people on board, many of them skilled Japanese technicians, only one survived. For the only time in the war, the US Government acknowledged responsibility for wrongfully sinking an enemy ship and promised compensation after the war. Queenfish's commanding officer was court martialled for negligence, but was later exonerated based on the fact that Awa Maru was later discovered to be smuggling rubber and other war materials. ww2dbase [Main Article | AC]
• B-24 bombers of 43rd Bomb Group (H) of US 5th Army Air Force attacked Giran Airfield in northern Taiwan. ww2dbase [Main Article | CPC]
• B-25 bombers of US 38th Bombardment Group attacked Karenko Airfield, Taiwan. ww2dbase [Main Article | CPC]

• Allied convoy RA-65 arrived at Loch Ewe, Scotland, United Kingdom. ww2dbase [Main Article | CPC]

1 Apr 1945 Interactive Map