| 11 August 1877 |
United States
|
Astronomy
|
Mars gains a known moon
|
| 11 August 1877 |
United States
|
Astronomy
|
Angelina Hall encourages the continued search
|
| 11 August 1877 |
United States
|
Astronomy
|
A faint Martian point proves to be Deimos
|
| 25 February 1870 |
United States
|
Racism
|
Hiram Revels becomes the first Black US senator
|
| 3 February 1870 |
United States
|
Racism
|
The Fifteenth Amendment prohibits racial voting exclusions
|
| 9 July 1868 |
United States
|
Racism
|
The Fourteenth Amendment establishes equal protection
|
| 9 April 1866 |
United States
|
Racism
|
Congress establishes citizenship and civil rights over a veto
|
| 6 December 1865 |
United States
|
Racism
|
The Thirteenth Amendment ends legal slavery with a punishment exception
|
| 31 January 1865 |
United States
|
Racism
|
Congress approves the constitutional abolition amendment
|
| 29 November 1864 |
United States
|
Racism
|
US troops massacre Cheyenne and Arapaho at Sand Creek
|
| 2 June 1863 |
United States
|
Racism
|
The Combahee River raid frees hundreds of enslaved people
|
| 1 January 1863 |
United States
|
Racism
|
The Emancipation Proclamation takes effect
|
| 22 September 1862 |
United States
|
Racism
|
The preliminary Emancipation Proclamation announces a change in war policy
|
| 16 April 1862 |
United States
|
Racism
|
Slavery ends in the US capital
|
| 6 March 1857 |
United States
|
Racism
|
The Supreme Court rejects Dred Scott’s citizenship claim
|
