https://upload.wikimedia.org/wikipedia/commons/4/4c/Franz_ferdinand.jpg
- Assassination of the Archduke Franz Ferdinand- made people angry, especially in Austria. after the Archduke was assassinated war had happens between them and Serbia
- Taking sides of countries with the Central and Allied Powers- if you were neutral, nobody could say that you were fighting against them
- Nationalism- many people having pride in there country
- Imperialism- causing tension by trying to take over weaker civilizations
- Militarism- strong military, makes them imperialism more people because they have no chance against them