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100

an increase in the importance of the military of a country

militarism

100

Heir apparent to the Austrian emperor, the assassination of him and his wife led to the beginning of World War I

Archduke Francis Ferdinand

100

to prepare for war

mobilize

100

a truce or cease-fire agreement between warring nations

armistice

100

financial payments by the loser of a war

reparations

200

a situation in which neither side can win a victory

Stalemate 

200

German submarines

U-boats

200

a new kind of warfare in World War I that involved troops digging and fighting from deep trenches

trench warfare

200

Lasting from February 1918 to April 1920, it infected 500 million people – about a third of the world's population at the time – in four successive waves.

Influenza

200

a passenger ship bombed by Germany

Lusitania

300

people who believe in communism, or the political system in which all resources are shared equally

Communists

300

A list of specific proposals for postwar peace. One point called for the creation of an international assembly of nations called the League of Nations.

Fourteen Points

300

a coalition of governments designed to find peaceful solutions to disagreements

League of Nations

300

wrote the Fourteen Points. Was president during World War I. For his role in helping found the League of Nations, Wilson won the Nobel Peace Prize in 1919.

Woodrow Wilson

300

commander of the American Expeditionary Force

John J. Pershing

400

a group of nations that allied to fight the Central powers in World War I, and those countries in opposition to the Axis powers in World War II

Allied powers

400

the coalition of nations in World War I that included the German, Austrio-Hungarian, and Ottoman empires

Central powers

400

A U.S. senator from Massachusetts, he was opposed to President Wilson’s plan for the League of Nations, fearing it would draw the United States into wars not in the nation’s interest.

Henry Cabot Lodge

400

the U.S. military forces sent to Europe during World War I and led by General John J. Pershing

American Expeditionary Force

400

brought an end to World War I, but was never ratified by the United States

Treaty of Versailles (1919)

500

a telegram from Germany to Mexico offering Mexico a return of territory in exchange for declaring war on the United States

Zimmermann note

500

a law that allowed the president to draft soldiers in times of war

Selective Service Act

500

loans to the government that aided its ability to prepare for World War I

Liberty bonds

500

a government agency organized to help settle disputes between workers and employers in war industries

National War Labor Board

500

The 369th Infantry spent 191 days in combat, longer than any other American force sent to Europe during World War I.

Harlem Hellfighters