When did World War I start and end?

The first world war started in 1914 with the assassination of the Austrian archduke by a man of Serbian ethnicity, which gave the Austro-Hungarian empire a valid reason to start the conflict, which it was looking for in order to expand its borders. The war officially started on 28th July 1914 two days after archduke was shot dead. The war officially ended on 11 November 1918 after the defeat of Austro-Hungarian empire, which resulted in the treaty of Versailles which many believes that rooted the World War 2 (WW2).