it was over the assassination of arch duke Franz Ferdinand by Serbian group the black hand,
When countries all over the world are in a war.
World War 2 started.
World War 2
War which alot of countries from all over the world are engaged in
1918
World War 1.
Because Adolf Hitler was talking over all of country all over the world.
you cant world war one is over
the countries were fighting over toys
It was the most deadliest war with over 62 to 78 million casualties.
Why world war 1 start this war started when Australia decided to take over Gallipoli
WW2 prevented the total conquer of the Nazis over the world.