What was the main cause of the World War 1?

Answer 1

they were the killing of the archduke and the archduchess and to conquer Europe 4

Answer 2

The trigger is widely believed to be the assassination of Archduke Ferdinand of the Austro-Hungarian Empire, which put into motion a series of military mobilizations required under several international treaties, which in turn eventually led to war.

or

M:militaryism-countries making better army and Navies

A:alliance-most countries were part of an alliance so i country started a war lead to everyone fighting

I:Imperialism-one county taking over another because they thought it was the right thing to do

N:nationalism-pride for your country