18. Gavrilo Princip
The assassination of Archduke Franz Ferdinand created countless problems for many countries in the surrounding areas. This all started in 1914 when a Serbian student named Gavrilo Princip shot the Archduke dead.
Franz arrived in Sarajevo and took a motorcade towards the town hall, where he was shot at by Princip. These attempts were unsuccessful, and Princip carried out his wishes when he cornered Ferdinand’s car while on the way to a local hospital.
Princip fired twice into the car and killed Franz immediately. After his death, the Hungarian empire declared war against Serbia, which led to countless allies getting involved. This assassination and the following war was the triggering point for World War 1.