Era 7: 1890-1930
| DATE: | EVENT: |
| Jul. 3, 1890 | Idaho is the 43rd state admitted to the Union.
| Jul. 10, 1890 | Wyoming is the 44th state admitted to the Union.
| Mar. 4, 1893 | Grover Cleveland is sworn in as the 24th President of the United States.
| Mar. 4, 1893 | Adlai Stevenson is sworn in as the 23rd Vice President of the United States.
| Jan. 4, 1896 | Utah is the 45th state admitted to the Union.
| Mar. 4, 1897 | William McKinley is sworn in as the 25th President of the United States.
| Mar. 4, 1897 | Garret Hobart is sworn in as the 24th Vice President of the United States.
| Apr. 20, 1898 | The United States declares war on Spain.
| May 1, 1898 | American forces win the Battle of Manila Bay.
| Jul. 1, 1898 | American forces win the Battle of Santiago.
| Jul. 7, 1898 | The United States annexes Hawaii.
| Jul. 25, 1898 | American forces invade Puerto Rico.
| Dec. 10, 1898 | The United States and Spain sign the Treaty of Paris 1898, officially ending the Spanish-American War.
| Feb. 6, 1899 | The United States annexes Guam, the Philippines, and Puerto Rico.
| Mar. 4, 1901 | William McKinley is sworn in as President for a 2nd term.
| Mar. 4, 1901 | Theodore Roosevelt is sworn in as the 25th Vice President of the United States.
| Sep. 14, 1901 | Theodore Roosevelt is sworn in as the 26th President of the United States.
| Mar. 4, 1905 | Theodore Roosevelt is sworn in as President for a 2nd term.
| Mar. 4, 1905 | Charles Fairbanks is sworn in as the 26th Vice President of the United States.
| Jan. 16, 1907 | Oklahoma is the 46th state admitted to the Union.
| Mar. 4, 1909 | William Taft is sworn in as the 27th President of the United States.
| Mar. 4, 1909 | James Sherman is sworn in as the 27th Vice President of the United States.
| Jan. 6, 1912 | New Mexico is the 47th state admitted to the Union.
| Mar. 4, 1913 | Woodrow Wilson is sworn in as the 28th President of the United States.
| Mar. 4, 1913 | Thomas Marshall is sworn in as the 28th Vice President of the United States.
| Feb. 14, 1912 | Arizona is the 48th state admitted to the Union.
| Apr. 21, 1914 | American forces occupy Vera Cruz, Mexico.
| Jul. 18, 1914 | The United States Army Air Corps is established.
| Jul. 28, 1914 | World War I begins as the Ottoman Empire declares war on Bosnia.
| Aug. 4, 1914 | President Wilson issues a proclamation of neutrality.
| Aug. 15, 1914 | The Panama Canal opens for business.
| May 7, 1915 | British liner Lusiatnia is sunk by German U-Boats, killing 128 american passengers.
| Jun. 10, 1915 | The Girl Scouts is established.
| Jul. 29, 1915 | American forces invade Haiti.
| Mar. 9, 1916 | Pancho Villa raids Columbus, New Mexico.
| Mar. 15, 1916 | American forces drive Pancho Villa to Mexico.
| Jun. 15, 1916 | The Boy Scouts is established.
| Aug. 4, 1916 | The United States purchases the West Indies and the Virgin Islands for $25 million.
| Aug. 25, 1916 | The United States National Park Service is established.
| Mar. 2, 1917 | Puerto Rico is made a United States territory.
| Mar. 4, 1917 | Calvin Coolidge is sworn in as the 29th Vice President of the United States.
| Mar. 5, 1917 | Woodrow Wilson is sworn in as President for a 2nd term.
| Apr. 6, 1917 | The United States enters World War I on the side of the Allies.
| Aug. 5, 1917 | The United States National Gaurd is established.
| Mar. 3, 1918 | Russia pulls out of World War I.
| Nov. 11, 1918 | The Allied and Central Powers sign an armistice, ending World War I.
| Jun. 28, 1919 | The Treaty of Versailles is signed, ending World War I.
| Mar. 4, 1921 | Warren Harding is sworn in as the 29th President of the United States.
| Mar. 4, 1921 | Charles Dawes is sworn in as the 30th Vice President of the United States.
| Aug. 3, 1923 | Calvin Coolidge is sworn in as the 30th President of the United States.
| Mar. 4, 1925 | Calvin Coolidge is sworn in as President for a 2nd term.
| Mar. 4, 1925 | Charles Curtis is sworn in as the 31st Vice President of the United States.
| Mar. 4, 1929 | Herbert Hoover is sworn in as the 31st President of the United States.
| Mar. 4, 1929 | John Garner is sworn in as the 32nd Vice President of the United States.
| Oct. 29, 1929 | The New York Stock Market crashes - start of the Great Depression.
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