WW 1 causes

1)Describe and define the four MAIN causes of WWI. (a,b,c,d)
(militarism, alliances, imperialism, nationalism)

List and define each, and link to the start of the war.

2)What was the spark of war?  Explain it

3) Put these in order, and explain, each of the following; include the date. (a,b,c,d)

Zimmerman note, 

Sussex pledge, 

unrestricted sub warfare, 

Lusitania.