As far as this event contributed to the end of WWII.
The event that officially marked the end of World War I was the Treaty of Versailles. It was signed in a railroad car on June 28, 1919.
World War I
World War II brought the end of colonialism.
they just did:p
The signing of the Armistice on November 11, 1918, ended World War I.
Germany signed the Treaty of Versailles, resulting ini peace at the end of World War 1.
World War 1
World War II.
the atomic bomb
The atomic bomb
mabe
That was the beginning for the US. The end was dropping the A-bombs.