25 Jun 1876: Battle of the Little Bighorn,Lakota and Cheyenne warriors defeated U.S. Army forces led by General George Custer in Montana.
2
1877
2 Mar 1877: Compromise of 1877,A political deal that ended the disputed 1876 presidential election and resulted in the withdrawal of federal troops from the South, ending Reconstruction.
3
1881
1 Jan 1881: American Federation of Labor founded,The AFL was founded by Samuel Gompers as a national federation of labor unions.
4
1882
4 Sep 1882: Edison's Pearl Street Station,Thomas Edison's electric power plant began operation in New York City, providing power for the first time.
5
1886
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.
6
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.
7
1893
1 Jan 1893: Panic of 1893,A severe economic depression began, marked by bank failures and high unemployment.
8
1896
1 Jan 1896: Plessy v. Ferguson decision,The Supreme Court upheld the constitutionality of racial segregation under the "separate but equal" doctrine.
9
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.