1891
Populist Party forms
1899
Aguinaldo leads Filipino Insurrection
John Hay writes First Open Door Note
1900
Congress passes Gold Standard Act
Congress passes Foraker Act
U.S. sends troops to China to suppress Boxer Rebellion
Hay drafts Second Open Door Note
McKinley is reelected
1901
McKinley is assassinated; Theodore Roosevelt becomes president
Hay-Pauncefote Treaty
U.S. Steel Corporation forms
Insular Cases decided
Congress passes Platt Amendment
1902
Colombia rejects canal treaty
Anthracite Strike
Congress passes Newlands Act
1903
U.S. backs Panamanian revolt against Colombia
Hay–Bunau-Varilla Treaty
Congress passes Elkins Act
1904
Roosevelt issues Roosevelt Corollary to the Monroe Doctrine
Construction on Panama Canal begins
Lincoln Steffens publishes The Shame of the Cities
Roosevelt creates U.S. Forest Service
Northern Securities decision
Industrial Workers of the World forms
Theodore Roosevelt is elected president
1905
United States invades Dominican Republic
Roosevelt negotiates peace to end Russo-Japanese War
1906
San Francisco bans Japanese students from public schools
Algeciras Conference
United States invades Cuba
Upton Sinclair publishes The Jungle
Congress passes Pure Food and Drug Act, Meat Inspection Act, and Hepburn Act
1907
Roosevelt sends Great White Fleet on world tour
Roosevelt strikes “Gentlemen’s Agreement” with Japan
“Roosevelt Panic” hits
1908
Root-Takahira Agreement
Muller v. Oregon case
William Howard Taft is elected president
1909
Congress passes Payne-Aldrich Tariff
New York City garment worker protest
1910
Ballinger-Pinchot Affair
1911
Triangle Shirtwaist Company fire
Standard Oil anti-trust case
U.S. Steel Corporation anti-trust case
1912
Taft and Roosevelt split Republican Party
Woodrow Wilson is elected president
1913
Sixteenth and Seventeenth Amendments are ratified
Congress passes Federal Reserve Act and Underwood Tariff
1914
Panama Canal is completed
Congress passes Clayton Anti-Trust Act, establishes Federal Trade Commission
United States occupies Vera Cruz, Mexico
1915
Congress passes La Follette Seaman’s Act
United States invades Haiti
1916
Congress passes Workingmen’s Compensation Act, Federal Farm Loan Act, Warehouse Act, Adamson Act, and Jones Act
Pancho Villa attacks New Mexico
United States invades Dominican Republic
1917
United States buys Virgin Islands