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Definition: heir of the Austrian-Hungarian Empire and was assassinated by a Serbian named Princip Sarajevo in 1914

His assassination sparked the war.

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Definition: American statesman, author, explorer, soldier, and naturalist, who served as the 26th President of the United States

Roosevelt authorized the building of the Panama Canal.

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Definition:  American statesman and academic who served as the 28th President of the United States from 1913 to 1921

He was a major leader at the Paris Peace Conference in 1919, where he championed the proposed League of Nations.

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Definition:  the 25th President of the United States from March 4, 1897 until his assassination in September 1901, six months into his second term

William Mckinley was  responsible for Spanish-American War, Philippine-American War, and the Annexation of Hawaii, imperialism.

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Definition: an American businessman, politician, and newspaper publisher who built the nation's largest newspaper chain and media company Hearst Communications

Hearst opposed American involvement in the First World War and attacked the formation of the League of Nations. His newspapers abstained from endorsing any candidate in 1920 and 1924.

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Definition: American naval officer and historian who was a highly influential exponent of sea power in the late 19th and early 20th centuries

Alfred T. Mahan shaped American military planning and helped prompt a worldwide naval race in the late 19th and early 20th centuries.

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Definition:  a newspaper publisher of the St. Louis Post Dispatch and the New York World

Pulitzer introduced the techniques of yellow journalism.

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Definition: a treaty between the U.S. and Cuba that attempted to protect Cuba's independence from foreign intervention

It permitted extensive U.S. involvement in Cuban international and domestic affairs for the enforcement of Cuban independence

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Definition:  the first queen and last monarch of the Kingdom of Hawaii, ruling from January 29, 1891

Queen Liliuokalani was overthrown before she was able to decline the profit U.S. aimed to gain from their land.

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Definition: an American Republican Congressman and historian from Massachusetts

He is best known for his positions on foreign policy, especially his battle with President Woodrow Wilson in 1919 over the Treaty of Versailles.

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Definition: the movement of 6 million African-Americans out of the rural Southern United States to the urban Northeast, Midwest, and West that occurred between 1916 and 1970

The Great Migration represents the largest internal movement of any group in American history.

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Definition: an intergovernmental organisation founded on 10 January 1920 as a result of the Paris Peace Conference that ended the First World War

The League of Nations was unsuccessful and the U.S. didn't sign to be part of it.

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Definition:  a statement of principles for peace that was to be used for peace negotiations in order to end World War I

The principles were outlined in a January 8, 1918 speech on war aims and peace terms to the United States Congress by President Woodrow Wilson

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Definition: a war bond that was sold in the United States to support the allied cause in World War I

Subscribing to the bonds became a symbol of patriotic duty in the United States and introduced the idea of financial securities to many citizens for the first time

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Definition: The Espionage Act was reinforced by the Sedition Act of the following year, which imposed similarly harsh penalties on anyone found guilty of making false statements or talking about the war or government

The Espionage and Sedition Act had harsh punishments.

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Definition: Gardens that citizens planted to raise their own vegetables, so that food could be sent to the troops

Victory gardens helped troops by people growing their own food.

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Definition:  a United States government agency established on July 28, 1917, during World War I, to coordinate the purchase of war supplies between the War Department

At the center of the effort to rationalize the economy was the war industries board.

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Definition: a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico in the prior event of the United States entering World War I against Germany

The Zimmerman telegraph was intercepted by British Intelligence

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Definition: patriotic feeling, principles, or efforts, especially marked by a feeling of superiority over other countries

Nationalism was a fundamental underlying cause of World War I.

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Definition: a union or association formed for mutual benefit, especially between countries or organizations

Britain, France, and Russia formed the Triple Entente, while Germany, Austria-Hungary, and Italy joined in the Triple Alliance

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Definition: the belief or desire of a government or people that a country should maintain a strong military capability and be prepared to use it aggressively to defend or promote national interests

Militarism was one of the main causes of the First World War.

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Definition: a category of foreign policies institutionalized by leaders who asserted that their nations' best interests were best served by keeping the affairs of other countries at a distance

America used isolationism before getting involved in WWI.

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Definition: a British ocean liner that a German submarine sank in World War I

The sinking of the Lusitania caused an uproar between countries.

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Definition: the use of a country's financial power to extend its international influence

The foreign policy created by U.S. Pres. William Howard Taft to ensure the financial stability of a region while protecting and extending U.S. commercial and financial interests there.

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Definition: ideas spread to influence public opinion for or against a cause

Propaganda was used during WWI to ration and gain funds for the war

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Definition: waterway in Panama that connects the Atlantic Ocean with the Pacific Ocean

The Panama Canal remained a U.S. protectorate until 1936.

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Definition: the system in which support is given only to countries whose moral beliefs are analogous to that of the nation

Moral Diplomacy is a form of diplomacy proposed by US President Woodrow Wilson in his 1912 election.

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Definition: International negotiations backed by the threat of force

refers to U.S. President Theodore Roosevelt's foreign policy: "speak softly, and carry a big stick."

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Definition: an addition to the Monroe Doctrine articulated by President Theodore Roosevelt

The corollary stated that not only were the nations of the Western Hemisphere not open to colonization by European powers, but that the United States had the responsibility to preserve order and protect life and property in those countries.

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Definition: officially supported peasant uprising of 1900 that attempted to drive all foreigners from China

The Society of the Righteous and Harmonious Fists led an uprising in northern China against the spread of Western and Japanese influence there.

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Definition:  the popular nickname for the powerful United States Navy battle fleet that completed a journey around the globe from 16 December 1907, to 22 February 1909,

The journey was by order of United States President Theodore Roosevelt.

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Definition: a US term for a type of journalism that presents little or no legitimate well-researched news and instead uses eye-catching headlines to sell more newspapers

Techniques may include exaggerations of news events, scandal-mongering or sensationalism.

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Definition: Belief that english-speaking nations had superior characters, ideas, and systems of govt. and were destined to dominate the world

This belief was part of what led white people to think that other countries needed their help where they took over their land for profit.

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Definition:  war that was fought between the United States and Spain in 1898

On April 25, 1898 the United States declared war on Spain following the sinking of the Battleship Maine in Havana harbor on February 15, 1898.

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Definition: statement of principles initiated by the United States in 1899 and 1900 for the protection of equal privileges among countries trading with China and in support of Chinese territorial and administrative integrity

The open door policy was aimed to keep Chinese markets open for all.

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Definition: Nickname given to members of African American cavalry regiments of the U.S. Army who served in the western United States from 1867 to 1896

the Buffalo Soldiers were established by Congress as the first peacetime all-black regiments in the regular U.S. Army.

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Definition: theory that individuals, groups, and peoples are subject to the same Darwinian laws of natural selection as plants and animals

Social Darwinism was used to justify political conservatism, imperialism, and racism and to discourage intervention and reform.

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Definition: a policy of extending a country's power and influence through diplomacy or military force

By 1900 the British Empire extended over five continents and France had control of large areas of Africa.

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Definition: a state that is controlled and protected by another

Many colonies and territories of the losing side of WWI (notably Germany and the Ottoman Empire) became League of Nations protectorates as a result of the Treaty of Versailles.