| 1876 | End of Reconstruction Battle of Little Big Horn |
| 1877 | Munn v. Illinois: Court rules states may regulate warehouse rates |
| 1879 | Stand Oil Trust formed |
| 1880s | Big Business emerge |
| 1883 | Railroad companies divide nation into four time zones Pendleton Civil Service Act |
| 1886 | Haymarket Riots |
| 1887 | Interstate Commerce Commission Davies Act |
| 1890 | Sherman Anti-Trust Act Massacre at Wounded Knee Sherman Silver Purchase Act |
| 1890-1920 | Fifteen million "new" immigrants |
| 1893 | Repeal of Sherman Silver Purchase Act |
| 1895 | Pollock v Farmers Court strikes down income tax |
| 1898 | War with Spain Hawaii annexed |
| 1899 | Peace with Spain, U. S. receives Philippines, Samoa, Guam, and Puerto Rico |
| 1900 | Gold Standard |
