#OTD20

On This Day in the 20th Century

#OTD20 | September 17, 1939

Soviet Union Invades Poland

September 17, 1939: The Soviet Union invades Poland marking an alarming escalation of hostilities in Central Europe. 

The offensive, coming on the heels of Germany's invasion of September 1st, begins in the early morning hours. Soviet forces inform Polish frontier guards they have arrived to liberate them from the fascists, then open fire. Moscow declares the Polish government in Warsaw has "ceased to exist."

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The United States' draft and wartime preparations is chronicled in our program, World War II, from AMERICA IN THE 20TH CENTURY.

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Additional Resources

Access more information from Media Rich Learning and curated off-site sources.

U.S. Holocaust Memorial Museum

Read more about the Soviet invasion at the USHMM website.

Jerusalem Post

Read an informative #OTD blog post from the Jerusalem Post.

#OTD20

Step back in time to experience the significant events that happened on this day in the 20th century.

September 29, 1950: Reaching the 38th Parallel in Korea

#OTD20 — September 29, 1950: Exploring the day U.S.-led troops reached the 38th parallel—the dividing line between North and South Korea—during the Korean War.

October 2, 1944: Warsaw Uprising – Remembering Poland’s Fierce Resistance

#OTD20 — October 2, 1944: After 63 days of intense fighting, the Warsaw Uprising ends with the surrender of Polish insurgents.

October 4, 1957: Sputnik Launch Ignites the Space Race

The Sputnik launch marks the beginning of the space age and the U.S.-Soviet space race. Dive into this #OTD20 event with Media Rich Learning.

October 5, 1914: First Aerial Combat Victory Ushers in New Age in Military Strategy

The Sputnik launch marks the beginning of the space age and the U.S.-Soviet space race. Dive into this #OTD20 event with Media Rich Learning.

October 6, 1991: Anita Hill Allegations Emerge: A Pivotal Moment for the Supreme Court and the Nation

#OTD20 — October 6, 1991: Anita Hill’s allegations of sexual harassment against Clarence Thomas shake the nation.

October 7, 1963: President Kennedy Signs Nuclear Test Ban Treaty

#OTD20 — October 7, 1963: President Kennedy signs the Nuclear Test Ban Treaty, prohibiting nuclear tests in the atmosphere, underwater, or in space.

October 10, 1986: Reagan and Gorbachev at the Reykjavik Summit

#OTD20 — October 10, 1986: President Reagan and Soviet leader Gorbachev meet in Reykjavik to discuss arms control. Despite high hopes, they leave without no major agreements.

October 11, 1936: Mother Jones Memorial Dedicated

#OTD20 — October 10, 1986: President Reagan and Soviet leader Gorbachev meet in Reykjavik to discuss arms control. Despite high hopes, they leave without no major agreements.

October 12, 1945: The Conscientious Objector Who Became a War Hero

#OTD20 — October 12, 1945: Private Desmond Doss, a conscientious objector, is awarded the Medal of Honor for his unparalleled bravery during World War II.

October 14, 1946: Truman Lifts Price Controls on Meat

#OTD20 — October 10, 1986: President Reagan and Soviet leader Gorbachev meet in Reykjavik to discuss arms control. Despite high hopes, they leave without no major agreements.

October 15, 1945: The Moratorium to End the War in Vietnam – A Day of Nationwide Protests

#OTD20 — October 15, 1969: Hundreds of thousands across the U.S. unite in a massive protest against the Vietnam War.

October 16, 1973: Kissinger and Tho Awarded Nobel Peace Prize

#OTD20 — October 14, 1946: Henry Kissinger and Le Duc Tho receive the Nobel Peace Prize for their diplomatic efforts in the Paris peace accord.

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