1 May 1886: Haymarket Affair A labor protest rally in Chicago turned into a riot after a bomb was thrown, killing police officers and civilians.
28 Oct 1886: Statue of Liberty dedicated The Statue of Liberty was dedicated in New York Harbor.
2
1890
1 Dec 1890: Wounded Knee Massacre U.S. soldiers killed over 150 Lakota people in what is considered the final major conflict of the Indian Wars.
29 Dec 1890: Sherman Antitrust Act Congress passed the first federal law prohibiting trusts and monopolies to promote competition.
3
1893
1 Jan 1893: Panic of 1893 A severe economic depression began, marked by bank failures and high unemployment.
4
1896
1 Jan 1896: Plessy v. Ferguson decision The Supreme Court upheld the constitutionality of racial segregation under the "separate but equal" doctrine.
5
1898
15 Feb 1898: USS Maine explodes The USS Maine battleship exploded in Havana Harbor, leading to the Spanish-American War.
21 Apr 1898: Spanish-American War begins The United States declared war on Spain.
13 Aug 1898: Spanish-American War ends The Treaty of Paris was signed, ending the war and ceding territories like Puerto Rico, Guam, and the Philippines to the United States.
6
1900
14 Dec 1900: Hawaii annexed The United States officially annexed Hawaii.
7
1901
14 Sep 1901: Theodore Roosevelt becomes President Theodore Roosevelt became president after the assassination of President William McKinley.
8
1903
1 Jan 1903: Wright brothers' first flight Orville and Wilbur Wright made the first powered, controlled, and sustained flight of an aircraft at Kitty Hawk, North Carolina.
9
1906
1 Jan 1906: San Francisco Earthquake A major earthquake and subsequent fires devastated San Francisco, California.
10
1908
1 Jan 1908: Ford Model T introduced Henry Ford introduced the Model T, making the automobile affordable for the average American.