I think it was Poland. Somebody check me on that. Wait maybe Austria and then Poland. I checked on this. It was Poland, September 1, 1940. Russia who had a secret pact with Germany opened up a second front a week later. There is an excellent account of this on .
Poland.
Germany invaded Poland, which started World War 2
Germany invaded France
Poland was invaded by Germany
Germany invaded Poland
Germany
Germany invaded Poland and as a result France and England declared war on Germany.
Germany invaded France
poland
Austria
GERMANY FIRST INVADED POLAND
Poland by Germany
Poland was invaded by Germany
Czecoslovakia
The Holocaust was not a military action
Belgium
Germany invaded Poland
Germany
Germany