Birthdays
Ephraim G. Alburtis
Turns 49 on this date
Charles James Faulkner
Turns 60 on this date
Justus A. McKinstry
Turns 52 on this date
Edmund Winston Pettus
Turns 45 on this date
Events
| US/the World | Britain and the African Kingdom of Madagascar conclude a treaty of friendship and cooperation. | 07/06/1866 |
| US/the World | In Britain, the long-serving Liberal Government of Earl Russell resigns. | 07/06/1866 |
| Lawmaking/Litigating | In Concord, the New Hampshire Legislature votes to ratify the Fourteenth Amendment. | 07/06/1866 |
| Legal/Political | The first session of the 39th Congress is sitting in Washington DC from early January to late July, 1866 |
01/07/1866 to 07/27/1866 |