The Great War; 4 questions

1. When and why did WWI break out?

The one single event the led to World War I starting was the assassination of Archduke Ferdinand. The assassination occurred on June 28, 1914.

The Triple Entente included; England, France and Russia.
The Triple Alliance included; Germany, Austria-Hungary and Italy.

2. When and why did the United States get involved in WWI?

The United States joined the war on April 6, 1917 on the side of England, France and Russia. The US got involved because of unrestricted sub warfare.

3. What were the casualty rates for the various countries involved?

4. When and why did the war end?

The war ended on November 11, 1918 because of the signing of the Treaty of Versailles.