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• » 9 Apr 1943

• British troops captured Mahares, Tunisia. ww2dbase [Conclusion of the Desert War | CPC]
• Ivan Bagramyan was awarded the Order of Kutuzov 1st Class. ww2dbase [Ivan Bagramyan | CPC]
• Horst Grund was wounded. ww2dbase [Horst Grund | CPC]

• USS Tunny made contact with a Japanese fleet off Truk, Caroline Islands at 2228 hours. She fired four torpedoes at the fleet, which now she realized was an aircraft carrier force, observing multiple hits. She then fired an additional six torpedoes before diving; the subsequent depth charge counterattack caused little damage. Later study of Japanese records revealed that the attacks caused only minor damage on the Japanese force as the torpedoes were detonated prematurely. ww2dbase [Tunny | Truk | CPC]

• U-339 arrived at Kiel, Germany and was reclassified as a training boat. ww2dbase [Kiel, Schleswig-Holstein | HM]

• Barbers Point Naval Air Station: Parts of British Fighter Squadrons 882, 896, and 898 departed. ww2dbase [Barbers Point Naval Air Station | Ewa, Oahu | DS]

• USS S-31 arrived at Nouméa, New Caledonia where she would be refitted and would serve as a target for training exercises. ww2dbase [S-31 | Nouméa | CPC]

• Nagara and Yugure was joined by Yuzuki and Yugiri at 0440 hours, and at 0530 hours the group arrived at disabled transport ship Kosei Maru's location; the transport was torpedoed by USS Tunny two days prior. The destroyers began an anti-submarine sweep and at 0558 hours Yuzuki dropped several depth charges against a possible target. At 1308, while in two by Nagara, Kosei Maru foundered and sank; 137 survivors were taken on by Nagara. ww2dbase [Nagara | Yugure | CPC]

• The German government re-designated Majdanek from a labor camp to a concentration camp. ww2dbase [Discovery of Concentration Camps and the Holocaust | Majdanek Concentration Camp | Lublin | CPC]
• The Chelmno Concentration Camp in Reichsgau Wartheland, Germany (occupied Poland) temporarily ceased its extermination operations. ww2dbase [Discovery of Concentration Camps and the Holocaust | Chelmno Concentration Camp | Chelmno nad Nerem, Konin | CPC]
• German officially renamed Majdanek Concentration Camp in occupied Poland to Lublin Concentration Camp (Konzentrationslager Lublin). ww2dbase [Discovery of Concentration Camps and the Holocaust | Majdanek Concentration Camp | Lublin | CPC]

• The keel of submarine Parche was laid down at the Portsmouth Naval Shipyard in Kittery, Maine, United States. ww2dbase [Parche | Kittery, Maine | CPC]
• The modified P-38G aircraft which Benjamin Kelsey was test flying failed to pull out of a dive; Kelsey parachuted to safety, albeit suffering a broken ankle on landing, but the aircraft would crash near Calabasas, California, United States. ww2dbase [Benjamin Kelsey | Calabasas, California | CPC]

9 Apr 1943 Interactive Map