Long Term:
Mutual Defense Alliances * Russia and Serbia (Russia joined in first after war started between Austria-hungary and serbi, Russia was Serbias alliance, we can say Serbia triggererd the chain reaction) * Germany and Austria-Hungary * France and Russia * Britain and France and Belgium * Japan and Britain
Imperialism - Imperialism is when a country increases their power and wealth by bringing additional territories under their control. Before World War 1, Africa and parts of Asia were points of contention amongst the European countries for their resources. Tension caused by this because France and Britain had colonies-Germany was trying to get in on the action-wanted more land
Nationalism- Serbian black hand/Gavrilo princip
Militarism-Germany and Britain were both increasing their navy power=more tension and in german and russa particularly, militarism was having an influence on public policy
Immediate Causes- Theres only one immediate cause, the assassination of Franz Ferdinand :P. This one event made all the aforementioned items come into play. This was in protest to Austria-Hungary having control of this region. Serbia wanted to take over Bosnia and Herzegovina. This assassination led to Austria-Hungary declaring war on Serbia. Once that was declared Russia declared war on Austria-hungary due to their alliance which led to Germany declaring war etc etc.
If we look at the causes, it seems Serbia was the main cause. Sure imperialism and militarism were part of the reason, but they didn’t start the war. Serbian nationalism and its alliance system along with the assassination from a serban nationalist are what triggered the start of World War 1. It was the significance of this particular crime for Austro-Serbian relations that mattered.
Guys Important thing to know, when your talking about nationalism don’t say that the black hand was acting on behalf