Causes:
MAIN:
Militarism -
.Germany v Britain - naval rivalry
.Military leader anxious to use new tech
.Fighting in war = heroic
Alliance System:
.Triple alliance : Austria, Italy, German (AIG)
.Triple Entente: Britain, France, Russia (BFR)
Imperialism:
.Competition for colonies created tensions between European powers
Nationalism:
.after unification of Italy and unification of Germany, other ethnic groups hoped to create their own nations (caused ethnic tension)
.encouraged European powers to build up military capacity.
Effects:
.weakend power of Europe
.over 20 million killed
.rise of U.S. as global power
.framented middle east and spread nationalism
.ended Austrian-Hungarian empire
.new political boundaries drawn, east Europe
.economic disruption + war debt + economic depression = U.S. depression
.Intesnsification of women's suffrage movement.
Hope that helps! just studied this!!