World war i and the 1920s
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World War I and The 1920s. Imperialism. Imperialism. Imperialism is a policy by which one country takes control of another land or country. Imperialists believed the United Stats should acquire overseas colonies to maintain a strong economy. Imperialism and the United States.

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  • Imperialism is a policy by which one country takes control of another land or country.

  • Imperialists believed the United Stats should acquire overseas colonies to maintain a strong economy.

Imperialism and the united states
Imperialism and the United States

  • 1850s- Business leaders from the United States invested in sugar plantations in the Hawaiian Islands

  • 1893- The wealthy white plantation owners rebelled against Queen Liliuokalani, who opposed the increasing control of the owners.

  • 1890s- On February 15,1898, the U.S.S. Maine exploded while anchored in a Cuban harbor. Spain was blamed and the U.S. declared war.

  • 1904- President Roosevelt stated the new foreign policy of the U.S. called the Roosevelt Corollary.

Long term causes of world war i
Long-Term Causes of World War I

  • Nationalism- Belief in national unity and racial supremacy.

  • Imperialism- European nations searched for colonies during the 19th century because they produced more goods than they needed.

  • Military Expansion-Europeans maintained large standing armies in peace time in case of war.

  • Alliances- Germany, Austria-Hungary, and Italy formed the Triple Alliance. Great Britain, France, Russia and later the United States formed the Triple Entente or Allies.

Start of world war i
Start of World War I

  • On June 28, 1914, Archduke Francis Ferdinand was visiting Bosnia.

  • Serbian Nationalists shot the Archduke and his wife. This event started WWI.

Battle tactics and new innovations
Battle Tactics and New Innovations

  • Both sides primarily used trench warfare.

  • A no man’s land lay between the opposing trenches.

  • When each side introduced machine guns and poison gas, the war turned especially deadly.

  • Another important development in the war was the airplane.

Causes of united states involvement in wwi
Causes of United States Involvement in WWI.

  • The people of the United States did not want to go to war. Officially the U.S. was neutral.

  • The U.S. sold military goods to the Triple Entente.

  • In 1917, Germany began sinking United States merchant ships in the Atlantic.

  • This was seen as a reason for immediate war.

United states involvement in wwi
United States Involvement in WWI.

  • By the time the U.S sent troops the Europe to fight on the western front, the war on the eastern front had ended.

  • The Russians signed a treaty with Germany after the Russian Revolution.

Costs of the war
Costs of the war.

  • The combined costs to all nations fighting in the war was 186 billion dollars.

  • Over 20 million soldiers were casualties of the war.

  • An additional 10 million civilians died.

Consequences of the war
Consequences of the War.

  • In the event of future war all men in the U.S. between the ages of 21 and 30 were required by law to register for the draft.

  • In the treaty of Versailles(1919) the Germans reluctantly agreed that the war was entirely their fault.

  • When Adolf Hitler rose to power he used this bitterness to reclaim the achievements of Germany’s past.

The roaring twenties
The Roaring Twenties.

  • F. Scott Fitzgerald wrote The Great Gatsby.

  • Ernest Hemingway was regarded as one of the most influential writers of the twentieth century.

  • During the red scare the government arrested thousand of radicals.


  • 18th amendment outlawed the sale of alcohol.

  • This created speakeasies and bootleggers.