On this day

3 September

Events from the atlas database that began on this day in 1939–1945. Database entries only; days without entries are marked.

• 1939
  Britain and France declare war on Germany
  Diplomacy · London and ParisShow on map →
• 1939
  Battle of the Atlantic
  Naval operation · North AtlanticShow on map →
• 1943
  Armistice of Cassibile — Italy leaves the Axis
  Politics · Cassibile, SicilyShow on map →