The Soviet invasion of Poland was a military conflict by the Soviet Union without a formal declaration of war. On 17 September 1939, the Soviet Union invaded Poland from the east, 16 days after Nazi Germany invaded Poland from the west. Subsequent military operations lasted for the following 20 days and ended on 6 October 1939 with the two-way division and annexation of the entire territory of the Second Polish Republic by Nazi Germany and the Soviet Union. This division is sometimes called the Fourth Partition of Poland. The Soviet (as well as German) invasion of Poland was indirectly indicated in the "secret protocol" of the Molotov–Ribbentrop Pact signed on 23 August 1939, which divided Poland into "spheres of influence" of the two powers.
WWII: Russian Red Army crosses the Oder River between Poland and Germany
The Soviet invasion of Poland was a military conflict by the Soviet Union without a formal declaration of war.
Historical Significance
The Soviet invasion of Poland was a military conflict by the Soviet Union without a formal declaration of war.
Events Before
D-Day: The Normandy Landings
Allied forces launch the largest amphibious invasion in history on the beaches of Normandy, France, marking the beginning of the liberation of Western Europe from Nazi occupation.
Omar al-Bashir is born
Omar al-Bashir is born
Army defeats Navy 10-7 in football "Arab Bowl," Oran, North Africa
Army defeats Navy 10-7 in football "Arab Bowl," Oran, North Africa
Siege of Leningrad lifted by the Soviets after 880 days and more than 2 million Russians killed
Siege of Leningrad lifted by the Soviets after 880 days and more than 2 million Russians killed
Battle of Eniwetok: US forces take Enewetak Atoll at the cost of 37 Americans killed or missing and 94 wounded; Japanese
Battle of Eniwetok: US forces take Enewetak Atoll at the cost of 37 Americans killed or missing and 94 wounded; Japanese losses are 800 dead and 23 prisoners
Events After
UN General Assembly meets for the first time in London
The United Nations General Assembly (UNGA or GA) is one of the six principal organs of the United Nations (UN), serving as its main deliberative, policymaking, and representative organ.
United Nations Security Council holds its first meeting, at Westminster Central Hall in Westminster, England
United Nations Security Council holds its first meeting, at Westminster Central Hall in Westminster, England
American actor John Wayne (38) weds actress Esperanza Baur (25) in Long Beach, California; divorce in 1954
American actor John Wayne (38) weds actress Esperanza Baur (25) in Long Beach, California; divorce in 1954
NY Giants outfielder Danny Gardella is the first major leaguer to announce he is jumping to the "outlaw" Mexican Basebal
NY Giants outfielder Danny Gardella is the first major leaguer to announce he is jumping to the "outlaw" Mexican Baseball League for contract worth $13,000; triggers US MLB Commissioner Happy Chandler to impose a five-year minimum ban on players who move to the rival league
General Juan Perón is first elected President of Argentina
Juan Domingo Perón was an Argentine military officer and politician who was the 29th and 40th president of Argentina, serving from 1946 to his overthrow in 1955, and from 1973 to 1974.
More from the 1940s
D-Day: The Normandy Landings
Allied forces launch the largest amphibious invasion in history on the beaches of Normandy, France, marking the beginning of the liberation of Western Europe from Nazi occupation.
World War II: Representatives of 26 nations at war with the Axis powers sign the Declaration of the United Nations, pled
World War II: Representatives of 26 nations at war with the Axis powers sign the Declaration of the United Nations, pledging to make no separate peace deals
Mahatma Gandhi begins a march for peace in East Bengal
Mohandas Karamchand Gandhi (2 October 1869 – 30 January 1948) was an Indian lawyer, anti-colonial nationalist, and political thinker who employed nonviolent resistance to lead the successful campaign…
Omar al-Bashir is born
Omar al-Bashir is born
Frequently Asked Questions
- What happened on February 6, 1945?
- The Soviet invasion of Poland was a military conflict by the Soviet Union without a formal declaration of war. On 17 September 1939, the Soviet Union invaded Poland from the east, 16 days after Nazi Germany invaded Poland from the west. Subsequent military operations lasted for the following 20 days and ended on 6 October 1939 with the two-way division and annexation of the entire territory of the Second Polish Republic by Nazi Germany and the Soviet Union.
- Why is WWII: Russian Red Army crosses the Oder River between Poland and Germany significant?
- The Soviet invasion of Poland was a military conflict by the Soviet Union without a formal declaration of war.