On This Day - What happened 17 September 1939 AD

On 17 September, Soviet forces invaded eastern Poland.

Soviets invaded Poland from the east. The military operations lasted from 17 September to 6 October. Parting Poland to two divisions, division is ruled by Nazi Germany and the other by the Soviets.

Japan launched its first attack against Changsha, a strategically important Chinese city, but was repulsed by late September.