What were the causes of World War 1 in Europe?
a royal assassination. Archduke Ferdinand, from Bosnia, was assanated by Gavrillo Princeps, who was the leader of the Black Hand. When Europe heard about his death they wanted WAR.
One of the main causes of the extent of World War I was the alliances in Europe at the time, which brought many nations who had no stake in the original conflict into the war. Another cause of World War I was imperialism, which caused tension between European nations who were fighting over land to colonize.