Well it caused extreme pride throughout the European nations and for them to be overly confident. So, to achieve it and get this pride they competed for raw materials, markets, and land. Nationalism led to imperialism where they competed over size of empires and also led to militarism which led to them "glorifying the military" and competing over better and larger army.
This caused many disputes and tensions between the nations. Nationalism was basically the driving force that led to the war your welcome (.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.