- Jun 2 Confederate General Edmund Kirby Smith surrenders his Trans-Mississippi Department to Union forces at Galveston, Texas; he then flees to Mexico to avoid charges of treason
Tristan und Isolde
Jun 10 Richard Wagner's opera "Tristan und Isolde" premieres in Munich, Germany
Reconstruction
Jun 13 President Andrew Johnson proclaims reconstruction of confederate states
Juneteenth
Jun 19 Union General Gordon Granger declares slaves are free in Texas, now the date the end of slavery is celebrated across the US as Juneteenth
W. G. Grace
Jun 22 Acknowledged as 1st Class Cricket debut of Dr W. G. Grace; as a 16-year-old he is dismissed for 0 playing for Gentlemen of South v Players of South at Kennington Oval, London
- Jun 22 The CSS Shenandoah fires the last shot of the American Civil War in the Bering Strait to indicate surrender
- Jun 23 At Fort Towson, General Stand Watie surrenders last sizeable confederate army
- Jun 28 The Army of the Potomac is disbanded
- Jun 30 8 alleged conspirators in assassination of Lincoln are found guilty