Why didn't the not provide a lasting peace?

What metal things were used in World War 1? What did separate but equal lead to? What did The Enlightenment and the Great Awakening caused? What type of rifle did The Germans used on D-Day? How do you pronounce Siobhán? What three nation made up the Triple Entente? Is celabration a masculine or femanine noun? Why did the Soviet Union support the Iranian Revolution? What was an essential part of the economy of the Spanish and the Portuguese colonies? What are the Japanese temples made of? How did general MacArthur attempt to rebuild japan after the war? What is the definition for an historical event? What group of words comes first alphabetically? How might an event like the massacre in the pequot village change American Indian attitudes toward europeans? What were the names of the first 13 American colonies? Who were the first to establish colonies in the new world? How did Europe utilize their colonial resources in Africa to benefit their own economic and political interests? What was the outcome of the settlement L'Ouverture proposed to the white planters? Was there anyone else included in john Cabot voyage? Who The National Liberation Front was led by Communists and supported by?