On the evening of June 28, 1863, General Lee learned that the Army of the Potomac had already crossed the Potomac River and was converging on Frederick, Maryland. This was approximately thirty miles south of Gettysburg. Lee also learned that General Joseph Hooker had been replaced by General George G. Meade. Lee had already defeated Hooker at Chancellorsville and Lee was well prepared to meet Hooker a second time. The changeover, however, was greeted as good news. Lee believed the change of command would be of benefit since he anticipated that some confusion and adjustments would needed to be made to the Union army.
Robert E. Lee
Robert E. Lee.
Chancellorsville, Virginia.
If it is the Battle of Gettysburd you refer to, the Union General George Meade and Confederate General Robert E. Lee fought.
Robert Teichmüller was born in 1863.
Robert Reily died in 1863.
Robert College was created in 1863.
Henri-Robert was born in 1863.
Robert Hewat was born in 1863.
There is no information on how many commanding generals President Lincoln had gone through by June 1863. General George Meade commanded the Union army and General Robert E. Lee commanded the Confederate army.
Ulysses S. Grant
Robert Fitzsimmons was born on May 26, 1863.