Because of the assasination of Archduke Franz Ferdinand of Austria
The assassination of Archduke Ferdinand started WW I, but it did not bring the US into the war. The US came in after repeated sinkings of civilian ships, including the Lusitania, and the discovery that the Germans were attempting to bring Mexico into the war on their side.
The U.S. Entered World War 1 in 1917.
They didn't enter the first world war
It started in 1914
The US itself was responsible for its decision to enter the war.
No, World War 1 ended in 1918 and the attack on Pearl Harbor was on December 7, 1941. Pearl Harbor was the event that provoked the US to enter World War 2, not 1.
because there cool
The US joined the war on the side of the Allies on April 6, 1917.
Please, retry to type that.. But, yes, they did enter the World War I.
The sinking of the Lusitania had an effect. 128 US citizens were drowned, but this was in 1915 & the US does not enter the war until April of 1917....
We were in the end\middle of the great depression.
sinking of lusitania
Europe needed help and weapons