The US's entry to the Great War was far from a forgone conclusion.
It was considered a "European War" between the great powers - France, Germany, Britain, Austria, Ottomans and Russia - US public and political opinion was for neutrality but was gradually set against Germany by a string of events.
Unrestricted Submarine Warfare, German U-boats would attack and sink any ships thought to be carrying goods to an Allied Country. This violated the principle of neutrality. Although the Royal Navy was operating a blockade of Germany which had much the same effect; they were impounding rather than sinking ships and US trade with Britain was larger than it's trade with Germany so the German method had a larger effect on US opinion. The German's suspended this for a time after the sinking of the RMS Lusitania - a British liner which had a large number of passengers including Americans aboard - but resumed it in early 1917.
German Sabotage - German agents were blamed rightly or wrongly for a string of incidents in the US.
The Zimmerman Telegram - British intelligence intercepted an offer from German to Mexico where in return for attacking the US, and so removing the support in trade that the US was giving the Allies, Mexico would have some of the territories lost to the US in the Mexican-American war in the 1840's restored. Mexico said no - it was an impractical idea anyway - but the very idea inflamed US opinion.
These together made selling the idea of American intervention possible for the government.
Geopolitical reasons. They feared Japan and Germany would win their wars and then turn onto America proper. America knew it had to fight them sooner or later and better to fight when their allies were still around.
The attack on Pearl Harbour gave them the excuse they wanted: The Japanese attacked because they believed the US would enter the war anyways so why not destroy their navy beforehand.
They also desired to become a superpower.
they needed more back up , and the felt that they were more on their side then anybody else
because the usa wanted you to go ask your mum
what war, pearl harbour would be a good reason,
it was being attacked by the axis powers
The US entered the war in April of 1917 and were on the Allies side.
The US declares war on the empire of japan. The United States of America also entered world war 2 on the allies side, after Hitler declare the US war.
One of the main reasons the US entered World War I on the side of the allies was because the Germans had sunk the Lusitania, a passenger ship containing many Americans.
As soon as the US entered the war in December 1941
I think you meant to ask about WWII, since Japan was on the Allies side (i.e. the side of Britain and Australia ans the USA) in WWI.
The US entered the war in April of 1917 and were on the Allies side.
the South
announced its policy of unrestricted submarine warfare
The allies entered the war in 1914; the US entered the war in 1917.
The highlight was when the US/Allies pushed the North Koreans up to the Red Chinese border. The bad part was when Red China entered the war, and pushed the US/Allies back down again.
Yes, although officially neutral the US government covertly supported the Allies from the start . They formally entered the war on the Allied side in 1917.
America remained isolated from the conflict until the UK asked for assistance. The US helped to fund the UK's war effort which pulled the US out of 'The Great Depression'. After this proved not to be enough, the US entered the war and eventually brought the Allies to victory.
In which conflict? They have been on the same side in many wars, on completely opposing sides in others, and neutral (even through their allies) in others.
Canada
The US declares war on the empire of japan. The United States of America also entered world war 2 on the allies side, after Hitler declare the US war.
The same as in World War I : the Allies consisting of the Free French, the USSR, the UK, and the other Commonwealth countries.
allies