World War One: The Assassination of Archduke Ferdinand.

There were three main causes leading up to World War 1, but it wasn't until June 28, 1914 the assassination of Archduke Franz Ferdinand triggered World War 1 which began on July 28, 1914.
The main causes leading to World War 1 were: The Rise of Nationalism, Build-up of Military might, and system of military alliances. Europe avoided major wars in the 100 years before world War 1 began. In the 1800s, nationalism swept across the continent that help bring about the Great War. Nationalism led to the creation of two new powers - Italy and Germany - through the uniting of several small states.…