Poland
There were some countries that were neutral during World War 2 that invaded Germany. These countries included the United States and Sweden.
In the Thirties, Germany occupied Austria and, later, Czechoslovakia. On September 1, 1939, Germany invaded Poland, which triggered World War II. Germany then invaded numerous other countries including most of Europe and north Africa.
Germany never invaded the United Kingdom, Hitler failed in invading the UK in 1940.
Italian Somaliland, Ethiopia, then Libya.
Poland
Ethiopia
poland
He first invaded Ethiopia
Germany invaded France
Austria
Poland. _____ Perhaps the questioner and original answer contributor are thinking of WW2. The first "invasion" in WW1 was when Austria-Hungary invaded Serbia on July 28, 1914. Germany invaded Poland on Sept. 1, 1939 to start WW2.
Poland , 1939 .
GERMANY FIRST INVADED POLAND
No Hitler never invaded Germany, he was the leader of Germany during the war.
Poland by Germany
Poland was invaded by Germany