The Second Soviet–Polish War (Munich Goes Sour)

The Second Soviet–Polish War was a conflict between the Soviet Union and Poland and a part of World War II.

In October 1938 the Soviet Union and France (along with the United Kingdom) declared war on Nazi Germany in response to their invasion of Czechoslovakia, honoring their respective alliance treaties. Because of this, the Soviet Union entered into negotiations with the United Kingdom, France, Poland, and Romania to establish a formal alliance against Nazi Germany. The negotiations failed when the Soviet Union insisted that Poland and Romania give Soviet troops transit rights through their territory as part of a collective security agreement.