September 3: A German attempt to liquidate the Jewish ghetto in Lakhva leads to an uprising.

September 5: Battle of Milne Bay: Japanese forces suffer their first defeat on land.

September 5: The Jews of Wolbrom, Poland were rounded up by the Germans and their collaborators. What was once a flourishing community suddenly ceased to exist.

September 9: A Japanese floatplane drops incendiary devices at Mount Emily, near Brookings, Oregon, in the first of two "Lookout Air Raids", the first bombing of the continental United States.

September 10: Women's Auxiliary Ferrying Squadron (WAFS) begins operation.

September 12: The RMS Laconia, carrying civilians, Allied soldiers and Italian POWs, is torpedoed off the coast of West Africa and sinks.

September 15: Women's Flying Training Detachment (WFTD).

September 24: Andrée Borrel and Lise de Baissac become the first female SOE agents to be parachuted into occupied France.

September 27: Both commerce raiding hilfskreuzer Stier and Liberty ship Stephen Hopkins sink following a gun battle in the South Atlantic. Stier is the only commerce raider to be sunk by Defensively Equipped Merchant Ships. (source: Wikipedia)