German submarines blockaded Britain and attacked U.S. ships.
1917
The US did enter World War 1, though not till 1917.
Some time near the end of WW3
The United States entered World War I in 1917 because of several reasons. One of the main reasons was Germany's unrestricted submarine warfare, which threatened American lives and interests. Additionally, the interception of the Zimmermann Telegram, in which Germany proposed an alliance with Mexico against the US, further pushed the US towards joining the war on the side of the Allies.
Lenin was living in exile mostly in Switzerland up until about April 1917.
The United States did not enter World War I until April 1917. It was April 2, 1917 that President Wilson requested a declaration of war. The resolution passed 4 days later.
1917 smart
1917
1917
April 6 1917
The US did enter World War 1, though not till 1917.
technically world war 2 from 39 to 45 world war 1 was from 1914 to 1918 although America didnt enter until half way through 1917
1917
GENERAL "BLACK JACK" PERSHING. THE US DIDN'T ENTER WW1 UNTIL 1917
If you mean before 1917, no. we were neutral until 1917
April 6th 1917
April 7, 1917. Declared war on Germany.