japan
Africa
Germany declared war on the US, the US then declared war on Germany.
After Japan bombed Pearl Harbor we declared war on them. Germany was an ally of Japan so they declared war on us. Italy was an ally of Germany so they went along with Germany and declared war.
America declared war on Germany in 1941.
Slovenia.
I don't think that the US declared war on Germany. Germany declared war on the US on December 11th 1941
While the start of the war is generally held to be September 1st 1939, with the German invasion of Poland, it was on September 3rd 1939, that England; Scotland; Wales; Northern Ireland; France; Canada and Australia officially declared war on Germany. The official German surrender was signed at Rheims in France on May, 7th 1945.
After Japan attcked Pearl Harbor we declared war of Japan, and Germany.
On December 11, 1941, Germany declared war on the United States. Then later that day the United States Declared War on Germany in response.
Germany
France entered WWII because of a defensive pact woth Poland. Because Germany declared War on Poland, France declared war on Germany. If Germany had declared war on France first, then Poland would have declared war on germany. -Feewet