The UN was started in 1945, just after World War II.
It was the assasination of archduke franz Ferdinand that directly started world war 1
World War 2
It was Germany's invasion of Poland that began World War II.
Germany invaded Poland
The assassination of Franz Ferdinand
The assassination of Archduke Ferdinand
World War One started.
World War II.
The bombing of Pearl Harbor.
The Archduke of Austria, Franz Ferdinand, was killed by a gang of assassins in July 1914. When the killers escaped into Serbia, Austria-Hungary sent soldiers across the border to arrest them, effectively beginning World War 1.
Many events led to world war1 but the main event that started the war was when archduke Franz Ferdinand of austria-Hungary was assassinated by a serbian terrorist Many events led to world war1 but the main event that started the war was when archduke Franz Ferdinand of austria-Hungary was assassinated by a serbian terrorist