Question

what are the reason for first world war​

Answer 1

the main cause of first world was serbia king were killed by bosania.the serbia people asked why you killed my king they will ask.the bosania people will not the reason.the serbia will let's keep the war.this is the reason behind first world war

Answer 2

The immediate cause of the First World War was the assassination of the heir to the throne of Austria Hungary - Archduke Francis Ferdinand .

The other causes are :

Colonialism .

Aggressive nationalism .

Imperialism.

Division of Europe into groups.

Armament.