The last country to enter World War I was the United States, which declared war on Germany on April 6, 1917. While several nations had joined the conflict earlier, the U.S. decision to enter marked a significant turning point in the war, providing fresh troops and resources to the Allied Powers. The U.S. involvement helped to tip the balance against the Central Powers, contributing to the eventual Allied victory in 1918.
because they wanted the world to end in 1918 instead of 2012. because they all had treaties with each other.
Well it couldn't be One country if it was a WORLD war. The allied Powers had "won" the war. Google it.
He said it was a war to make the world safe for democracy
Germany invaded Belgium on August 4, 1914, as part of its strategy to attack France through the north. This violation of Belgian neutrality prompted Britain to declare war on Germany, while France was already allied with Russia and bound to enter the conflict. Consequently, the invasion of Belgium was a key trigger that led both Britain and France to enter World War I.
Tsarist Russia in World War I and the Soviet Union in World War II.
No, Chile was the last nation to join. They joined on April 11th, 1945.
Germany
Because they were friends with another country that was at war
World War 2 : Japan.
Mongolia, finally announced its support for the Allies on August 9, 1945. This was after the use of atomic weapons in Japan. There were many neutral nations that joined the Allies as the war was coming to a close. For a complete list of participants see; http://en.wikipedia.org/wiki/Participants_in_World_War_II
Japan.
The United Kingdom was the first member of the Commonwealth to enter World War 2.
I think it was. Every Country should be trying to help stop such a horrible war
Czechoslovakia
Tension
Poland.
I'm kinda sure they invaded Poland.