On this day

1 September

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

• 1939
  Invasion of Poland (September Campaign)
  Campaign · PolandShow on map →
• 1939
  Battle of Westerplatte
  Battle · Westerplatte, DanzigShow on map →
• 1939
  Battle of Mokra
  Battle · Mokra near KłobuckShow on map →
• 1939
  Defence of the Hel Peninsula
  Battle · Hel PeninsulaShow on map →