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20 Sep 1943
  • HMS Polyanthus (Lieutenant J. G. Aitken) was torpedoed and sunk by the German submarine U-952, whilst on escort duties southwest of Iceland. ww2dbase [AC]
  • The Japanese Navy formed the 13th Air Fleet on paper with Vice Admiral Shiro Takasu in command and Rear Admiral Takeo Tada as the chief of staff. ww2dbase [CPC]
  • De Havilland Vampire jet fighter took its first flight. ww2dbase [CPC]
  • Rudolf Höss' fifth child Annegret was born. ww2dbase [Main Article | CPC]
  • USS Cisco departed Darwin, Australia for her first and only war patrol. ww2dbase [Main Article | CPC]
Australian Papua
  • Two Ki-49 aircraft of Japanese 7th Flying Regiment attacked Port Moresby, Australian Papua. ww2dbase [Main Article | CPC]
Caroline Islands China
  • The Japanese Autumn Mop-up Operation began in Hebei, Shandong, and Henan Provinces in China; 30,000 men were deployed to wipe out Chinese Communist guerrilla forces. ww2dbase [CPC]
  • Air operations at Naval Air Station Kahului on Maui, US Territory of Hawaii officially commenced with the arrival of Composite Squadron VC-23 and their SBD Dauntless scout bombers. ww2dbase [Main Article | DS]
  • British Eighth Army captured Bari, Italy. Meanwhile, Venice was bombed by Allied planes. ww2dbase [Main Article | TH]
Marshall Islands Pacific Ocean
  • USS Haddock fired 6 torpedoes on oiler Notoro in the Pacific Ocean, damaging her with 3 hits; Notoro, originally saililng for Japan, turned toward Truk, Caroline Islands for repairs. ww2dbase [Main Article | CPC]
  • USS Haddock fired a total of 12 torpedoes across the span of the day in the Pacific Ocean, damaging transport Shinyubari Maru with 3 hits and damaging another with 4 hits. Haddock was counterattacked several times on this date. ww2dbase [Main Article | CPC]
  • German Armeegruppe Süd began withdrawing to a new line running from Melitopol to Zaporozhe in Ukraine. ww2dbase [TH]
Photo(s) dated 20 Sep 1943
German PaK 40 gun near Salerno, Italy, late Sep 1943

20 Sep 1943 Interactive Map

Timeline Section Founder: Thomas Houlihan
Contributors: Alan Chanter, C. Peter Chen, Thomas Houlihan, Hugh Martyr, David Stubblebine
Special Thanks: Rory Curtis

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Famous WW2 Quote
"We no longer demand anything, we want war."

Joachim von Ribbentrop, German Foreign Minister, Aug 1939