they got in the fight
They did nothing until Japan bombed Pearl Harbor. Then the US Congress finally allowed FDR to send troops to the European Theater of Operations to help Britain defeat the Nazis. The US troops went to Africa to join the Brits in that effort. The rest is history.
A short awnser Hiroshima and Nagasaki
well the u.s. responded with sending in troops to Philippines.
regulations
President Roosevelt would have loved to aid Britain by sending over men and equipment to fight in that war. The Congress would never have approved it. When the Japanese attacked the US then the Congress was willing to declare war on Japan and Roosevelt got his wish when Adolf Hitler declared war on the US six days later. The Congress approve fighting in Europe then. Winston Churchill came over to the US to explain the problem in Europe so the Congress would know they were not fighting a vain war as the US had in World War 1.
They weren't. The US was at war with Japan first. It just so happens that Germany was defeated before the Japanese.
the answer is containment,which was simply not to have any battles with the soviet union but to simply stop them from enpanding and just stay at their borders stoping them were ever they found a gap through the defences of the u.s
The North Atlantic Treaty Organization
The North Atlantic Treaty Organization
The United States sought to remain free from involvement from the increasing tensions and aggression after the first world war. They sought and negotiated a number of treaties with the aim of establishing peace, but did not remain engaged, and the treaties collapsed.
Stop communist aggression.
Europe .