What was the indirect causes of World War 1?

Answer 1

The alliance system was a primary cause. When Serbia and Austria-Hungary were in a feud over the assassination of Archduke Franz Ferdinand, other countries were dragged into the war because many countries felt obliged to help their ally, leading to two sides fighting each other in World War I.

Answer 2

Famine and disese invaded and drove the soldiers crazy. It also affected the King of France, who died, and his son drove the army to war, and the other countries couldn't just let themselves to be attacked... so they defended themselves...

Answer 3

Imperialism, Nationalism, Malitarism, System of alliances. The direct cause was the assasination of Archduke Francis Ferdinand