And 1939...
1939: Germany invades Poland
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The Times newspaper reports that when the air raid sirens in the capital first sounded at 0600 inhabitants reacted calmly and some even ran out onto the streets to look up at the sky and had be driven back inside by air raid wardens.
The unprovoked attack follows yesterday's report on German radio that the border town of Gliwice had been raided by a group of Polish soldiers, who had all been shot dead.
German radio broadcast a list of "demands" never submitted to the Polish Government.
The Prime Minister, Neville Chamberlain, held a meeting with King George today in Downing Street. MORE...
http://news.bbc.co.uk/onthisday/hi/dates/stories/september/1/newsid_3506000/3506335.stm*****************
World War II Begins
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The Excuse
After having gained both Austria and Czechoslovakia, Hitler was confident that he could again move east, this time acquiring Poland without having to fight Britain and France. (To eliminate the possibility of the Soviet Union fighting if Poland were attacked, Hitler made a pact with the Soviet Union - the Nazi-Soviet Non-Aggression Pact.)
So that Germany did not officially seem the aggressor (which it was), Hitler needed an excuse for entering/attacking Poland. It was Heinrich Himmler who came up with the idea; thus the plan was code named Operation Himmler.
On the night of August 31, 1939, Nazis took an unknown prisoner from one of their concentration camps, dressed him in a Polish uniform, took him to the town of Gleiwitz (on the border of Poland and Germany), and then shot him. The staged scene with the dead prisoner dressed in a Polish uniform was supposed to appear as a Polish attack against a German radio station.
Hitler used the staged attack as the excuse to invade Poland. More...
http://history1900s.about.com/library/holocaust/aa090399.htm