the sinking of the ship The Lusitania and the breaking of the Sussex pledge.
April 7, 1917. Declared war on Germany.
The US joined the war on the side of the Allies on April 6, 1917.
The US entered World War 1 on April 6, 1917. The war ended about one and a half years later.
The US entered when it declared war on Germany on April 6th 1917. So they entered late.
If you mean before 1917, no. we were neutral until 1917
1917
1917 smart
April 6 1917
1917
The US did enter World War 1, though not till 1917.
1917
April 6th 1917
April 7, 1917. Declared war on Germany.
The United States declaration of war is from 6 April 1917.
US Congress declared war on Germany on 6th April 1917
The U.S entered WW1 on April 6, 1917
Some time near the end of WW3