it was the 2nd world war
The incident that triggered the beginning of World War 1 was the assassination of the heir to the Austro-Hungarian throne.
The Assassination of Archduke Franz Ferdinand of Austria triggered the start of the Great War (World War I)
the great depression triggered WWI
World War Two
Basically, it is the event that triggered the domino effect toward World War 1.
Romania did not want war; the Soviet and Hungarian invasion triggered the war.
The assassination of Archduke Franz Ferdinand caused World War I. This took place in 1914.
Archduke Ferdinand
Invasion of poland
invasion of poland
World War Two began in 1939.