•Archduke Franz Ferdinand from Austria-Hungary went to visit Sarajevo in Bosnia and during a parade the archduke and his wife were shot by a Serbian Nationalist. Austria-Hungary declared was on Serbia in world court.
Militarism was one of the main causes of World War 1 because of distrust, they built up armies.
Alliances were one of the main reasons why World War 1 started because they tried to prevent war. The alliances in the war were the Triple Alliance with Germany, Austria-Hungary, and the Ottoman Empire. The Triple Entinte was an alliance with Britain.
Imperialism was one of the main causes of World War 1 because countries wanted to dominate smaller countries and take over land. They also wanted raw materials and cultural spread.
Nationalism was one of the main causes of World War 1 because some countries had too much pride in their country and it created tension which eventually led up to war.
The meeting after the war controlled by the "Big 4"; Clemenceau, Orlando, Georgia, and Woodrow Wilson. Wilson brought a plan for peace called the 14 points. the main ideas were self determination and an association of Nations. France and England also wanted to punish Germany for the war.