Timeline of World War II (1940)

1940 in the Second World War
← 1939
1941 →

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
Location
Belligerents
Allies Axis
Vichy France
 Soviet Union Others
 Finland
 Estonia
 Latvia
 Lithuania
 Romania
 China  Japan

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.