Timeline of World War II (1940)

1940, clockwise from top left: IJA troops advance to Lạng Sơn during the Japanese occupation of French Indochina, a London Tube station serves an air-raid shelter during the Battle of Britain, German paratroopers arrive for the Battle of the Hague, mass grave of Katyn Massacre victims
Timelines of World War II
Chronological
Prelude
By topic
By theatre
World War II
Navigation

This is a timeline of World War II events that took place in 1940, the first full year of the second global war of the 20th century.