The Rhineland, Austria, Czechoslovakia, and Poland. Once Germany invaded Poland, Great Britain and France declared war on Germany starting World War Two.
Poland
The US declared war on Germany on Dec 11th 1941, (two days after Germany declared war on the US). Everything since that date to the present is after.
England and France declared war on Germany after it invaded Poland on Sept 1, 1939.
England and France declared war on Germany after Germany, (and Russia), invaded Poland.
England and France declared war on Germany after Germany, (and Russia), invaded Poland.
I don't think that the US declared war on Germany. Germany declared war on the US on December 11th 1941
Neville Chamberlain did so as Prime Minister.
September 1, 1939. Germany invaded Poland. Great Britain and France declared war on Germany.
Britain declared war on Germany on 3rd September 1939, two days after Germany invaded Poland.
After Japan attcked Pearl Harbor we declared war of Japan, and Germany.
While most of the Allies in Europe declared war on Germany when they attacked Poland, the two main powers were, England, and France.