Germany sent Mexico a document trying to get them to declare war on the USA and thereby prevent USA from entering the war on the side of the Allies. The British intercepted the document and after they showed it to the Americans, the USA declared war on Germany, entering WWI.
It was an act passed by Nixon to prevent Russia, China, North and South Korea from entering into Germany during World War 2
To make the world safe for democracy
they guns
For most of the war they were neutral, they saw it as an European war that they had no part in. However over time more and more people in the US realized that what happens in other countries doe s affect them, particularly when ever increasing numbers of American were being killed by Germany's unrestricted submarine warfare program. Eventually the American public sentiment turned toward entering the war on the Allied side.
There goals where to become a world power.
Germany
Austria had been annexed by Germany in March 1938.
Germany was punished for its role in World War I by the requirement of war reparations. Germany was unable to pay the high costs and eventually went into complete economic failure.
Great Britain demanded that Germany respect Belgium's neutrality, but Germany refused.
Germany declared war on Poland. Poland didn't have a choice.
stop
It eventually pushed Germany into submarine war, which eventually brought the USA into the war.
Germany and France. The part of Germany that they occupied was eventually called West Germany, while the Russians occupied East Germany.
The United Kingdom officially declared war on Germany on August 4, 1914, thereby entering World War I.
Russia occupied the Eastern Zone of Germany after the World War and eventually took it over under the communist regime of the USSR.
It triggered world war II, eventually causing another humiliating defeat for Germany.