Competition for colonies and resources in Africa and Asia.
Strong devotion to national interests, particularly in the Balkans. Competition for colonies and resources in Africa and Asia
Intense arms races and the glorification of military power. Competition for colonies and resources in Africa and Asia
The assassination of Archduke Franz Ferdinand of Austria-Hungary in Sarajevo on June 28, 1914. World Global Review: WWI in Ten Minutes Competition for colonies and resources in Africa and Asia
Complex secret treaties (Triple Entente vs. Triple Alliance) that turned a local conflict into a global one.