agreements among nations to aid each other if attacked

Archduke of Austria Hungary assassinated by a Serbian in 1914; His murder was one of the causes of WWI.

temporary peace agreement to end fighting

area of Eastern Europe made up of Croatia, Slovenia, Serbia and Romania and areas down to Greece; Also known as the "powder keg"

A group of revolutionary communists, led by Vladimir Lenin, who took control of Russia's government in November 1917.

Czar of Russia (1894-1917); He was overthrown during the Russian Revolution of 1917. Later, he and his family were killed by the Bolsheviks.

A sense of identification with a collective cultural group, largely based on the group's common heritage.

policy of extending the rule or authority of a nation over foreign countries

A British passenger ship that was sunk by a German U-Boat on May 7, 1915; 128 Americans died; The sinking greatly turned American opinion against the Germans, helping the move towards entering the war.

The four major causes of World War I: Militarism, Alliances, Imperialism, Nationalism

A policy of maintaining a strong military organization in aggressive preparedness for war.

loyalty or devotion to one's country

A position of not taking sides in a conflict.

a potentially dangerous situation; the Balkin Peninsula where ethnic tensions could explode at any moment

A deadlock in which neither side is able to defeat the other.

A form of warfare in which opposing armies fight each other from trenches dug in the battlefield

A policy in which Germany's U Boats would sink any ship in the British waters without warning.

A telegram Germany intended to send to Mexico; saying that if Mexico can keep the US out of the Great War then Germany would help Mexico regain its territories taken from the US like New Mexico, Texas and Arizona.

Allied Powers who met in Versailles. (President Woodrow Wilson of the United States, Prime Minister David Lloyd George of Great Britain, Prime Minister Vittorio Orlando of Italy, and Prime Minister Georges Clemenceau of France.)

A reduction in a country's ability to wage war, achieved by disbanding its armed forces and prohibiting it from acquiring weapons.

being skilled in the art of conducting negotiations and other relations between nations

Woodrow Wilson's plan for world peace; dealt with issues addressed to avoid war and boundary changes.

A weak international organization formed in 1920 to promote cooperation and peace among nations.

Treaty that ended WW I; It blamed Germany for WW I and handed down harsh punishment.

A provision in the Treaty of Versailles by which Germany acknowledged that it was responsible for WWI.