The Zimmerman Telegram and hundred of American ships being sunk by German submarines led to the U.S declaration of war on Germany.
After the Japanese attack on Pearl Harbor and the US Decleration of War against Japan, Germany declared War on the US.
Germany was sinking cargo ships supplying the Allies (Britain, France) and temporarily halted its policy of unrestricted submarine warfare. The resumption of this policy, combined with other factors, led to the US declaration of war in 1917, some three years after the fighting began in 1914.
General Pershing led American forces into Germany in 1918 to mark the first World War. The successful campaign led to the defeat of Germany by US forces.
Germany declared war on the US on 11 December 1941
it was part of the alliance thing germany was in alliance with japan and japan attacked usa in pearl harbour and declared war on japn therefore on germany as well answer 2: During World War 2, after Japan attacked the US, the US declared war on Japan. Germany in response declared war on the US, the only such declaration made by Nazi Germany. In response to the German declaration, the US declared war on Germany.
The US declared war on Germany on December 11, 1941 in response to Germany's declaration of war on the US earlier that day. In a separate act on the same day, the US declared war on Italy, which had also declared war on the US. Germany and Italy declared war on the US in response to the US declaration of war on their ally Japan on December 8, 1941 in response to the Pearl Harbor attack.
Germany resumed attacking American merchant ships
The US did not declare war on Germany in 1941, Germany declared war on the US as a measure of solidarity with Japan after their attack on Pearl Harbor and the Philippines.
Germany declared war on the US on 11 December 1941, four days after the Japanese attack on Pearl Harbour.
The Zimmermann Telegramproposal from Germany to Mexico to make war against the United States. It was ignored by Mexico but angered Americans and led in part to the declaration of war in April.
They didn't have to. On 11 December 1941, Germany declared war on the US.