The armed forces of Adolf Hitler's Germany invaded Poland on this day, 70 years ago. The invasion triggered the cascade of alliances which was to lead to the declaration of war two days later. Great Britain and France had pledged to come to the aid of the Poles, and sent an ultimatum to Berlin to withdraw or else. Poland fought back valiantly, but its army had no chance. After a month, Poland was overrun from west and east - the Soviet Union taking its cut as a result of the pact between it and Nazi Germany, signed in August 1939.
The lights went out 70 years today. It would be nearly 6 years before they were on again.