21 Oct 1939
  • Arthur Greiser was named the Gauleiter of Reichsgau Posen. ww2dbase [Arthur Greiser | CPC]
  • Nobutake Kondo was named the deputy commander of the Navy General Staff. ww2dbase [Nobutake Kondo | CPC]
Atlantic Ocean Germany
  • General Erich von Manstein, Chief of Staff of Army Group A, obtained a copy of Plan Yellow whilst passing through Berlin, Germany on his way to set up Army Group A Headquarters at Koblenz. He found little to admire in the plan, considering it to be too much like the strategy of 1914, and even predicting that the advance would bog down at the same place – on the Somme River in France. ww2dbase [Erich von Manstein | Berlin | AC]
Poland United States
  • The Uranium Advisory Committee in the United States, headed by Lyman Briggs of the National Bureau of Standards, met for the first time. The committee had a budget of US$6,000 at this time. ww2dbase [Operation Trinity and Manhattan Project | CPC]



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Control tower personnel in front of the tower at RAF Thurleigh, Bedfordshire, England, circa 1944.

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