Birthdays
Frederick H. Beecher
Turns 25 on this date
William Laws Boswell
Turns 38 on this date
James Henry Lane
Turns 52 on this date
James John Patterson
Turns 28 on this date
John Van Schaick Lansing Pruyn
Turns 55 on this date
Richard Wootton
Turns 74 on this date
Events
| US/the World | In Madrid, a mutiny of artillerymen led by their sergeants rocks Spain before being suppressed. | 06/22/1866 |
| Campaigns/Elections | Maine Republicans nominate Little Round Top hero Joshua Chamberlain for state governor. | 06/22/1866 |
| 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 |