Birthdays
John Decatur Barry
Turns 24 on this date
William Lewis Dewart
Turns 42 on this date
Henry Moses Judah
Turns 42 on this date
Horatio King
Turns 52 on this date
Robert Briggs Latham
Turns 45 on this date
Joseph Benson Perrie
Turns 32 on this date
James Lester Shipley
Turns 25 on this date
Events
| Battles/Soldiers | Baltimore barricades itself against the Confederate advance |
06/20/1863 to 06/21/1863 |
| Religion/Philosophy | In a sermon, Archbishop Hughes of New York blames the Confederacy for the continued bloodshed | 06/21/1863 |
| Battles/Soldiers | In Louisiana, the Siege of Port Hudson continues |
06/15/1863 to 07/08/1863 |
| Battles/Soldiers | In Mississippi, the Siege of Vicksburg continues |
05/26/1863 to 07/03/1863 |
| Crime/Disasters | In Newburgh, New York, an African-American accused of rape is taken from jail and lynched | 06/21/1863 |
| Battles/Soldiers | Near Upperville, Virginia, Union cavalry again clashes with the Confederate cavalry screen | 06/21/1863 |
| Battles/Soldiers | The Second Corps of the Army of Virginia crosses the Potomac and marches on Pennsylvania |
06/20/1863 to 06/22/1863 |
| Science/Technology | The summer of 1863 begins at precisely 5:54 pm, Washington DC time | 06/21/1863 |
Documents
| Military record | Orders of General Robert E. Lee to the Army of Northern Virginia, June 21, 1863 | 06/21/1863 |
| Book | Recollection by Ulysses S. Grant, Siege of Vicksburg, May – July 4, 1863 |
05/25/1863 to 07/04/1863 |