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• USS Cassin Young was launched. ww2dbase [Cassin Young | CPC]
• Adolf Hitler missed a chance to end the war in the Soviet Union when he refused to allow Ribbentrop to travel to Stockholm to meet with Soviet Minister Vladimir Dekanov who was willing to negotiate. On the same day, the last of the German armies which took part in the drive to the Caucasus retreated to the Crimea. In total 240,000 troops, 16,000 wounded and 27,000 civilians were evacuated along with 75,000 horses and vast numbers of vehicles and supplies. ww2dbase [TH]
• USS Snook fired 6 torpedoes at a Japanese transport; all torpedoes missed. ww2dbase [Snook | CPC]
• USS Pompon departed Brisbane, Australia for her second war patrol. ww2dbase [Pompon | CPC]
• The United States Marine Corps established the 2nd Raider Regiment (Provisional) to control the 2nd and 3rd Raider Battalions during the Bougainville operation in the Solomon Islands. ww2dbase [AC]

• Submarine USS Growler arrived at Brisbane, Australia after her sixth war patrol. During this patrol, Growler engaged no shipping. ww2dbase [Growler | Brisbane, Queensland | DS]
• Gato-class submarine USS Silversides arrived at Brisbane, Australia. ww2dbase [Silversides | Brisbane | DS]

• USS Nicholas arrived at Milne Bay, New Guinea. ww2dbase [Nicholas | Milne Bay | DS]

• Irako departed Truk, Caroline Islands with minelayer Tsugaru and destroyer Hamakaze in escort. ww2dbase [Irako | Truk | CPC]
• Naka departed Truk, Caroline Islands, escorting oiler Shiretoko and damaged aircraft transport Fujikawa Maru. ww2dbase [Naka | Truk | CPC]

• USS Cabrilla departed Pearl Harbor, US Territory of Hawaii for her first war patrol. ww2dbase [Pearl Harbor Navy Base and Ford Island Naval Air Station | Cabrilla | Honolulu, Oahu | CPC]
• USS Finback arrived at Pearl Harbor, US Territory of Hawaii, ending her sixth war patrol. ww2dbase [Pearl Harbor Navy Base and Ford Island Naval Air Station | Finback | Honolulu, Oahu | CPC]
• USS Grayback arrived at Pearl Harbor, US Territory of Hawaii. ww2dbase [Pearl Harbor Navy Base and Ford Island Naval Air Station | Grayback | Honolulu, Oahu | CPC]

• German Luftwaffe and SS personnel rescued Mussolini from Gran Sasso, Italy. ww2dbase [Operation Eiche | Benito Mussolini | L'Aquila, Abruzzo | TH]
• British X Corps near Salerno, Italy shifted into a defensive stance. Elsewhere in Italy, Bernard Montgomery's British XIII Corps reached Castrovillari and Belvedere, 130 kilometers south of Salerno. ww2dbase [Operation Avalanche | CPC]
• Several German troops were killed by resistance fighters in Naples, Italy while 4,000 Italians were deported from the Naples region (many of whom would become forced laborers). On the same day, Colonel Walter Schöll took command of the military occupation of Naples. ww2dbase [Naples Uprising | Napoli, Campania | CPC]
• Junio Valerio Borghese successfully negotiated with local German authority to avoid arrest; his Italian 10th MAS Flotilla was to be attached to the German Navy. Half of the flotilla, about 200 men, dissented and were sent on leave. ww2dbase [Junio Valerio Borghese | CPC]

• USS Permit attacked a Japanese convoy west of the Marshall Islands, sinking 2 transports and damaging an oiler; 10 torpedoes were expended during the attack. The pursuit would continue into the next day. ww2dbase [Permit | CPC]

• Orde Wingate departed Lisbon, Portugal for Cairo, Egypt. ww2dbase [Orde Wingate | Lisbon | CPC]

12 Sep 1943 Interactive Map