The Battle of Carlisle was an American Civil War skirmish fought in Pennsylvania on July 1, 1863, which was also the first day of the Battle of Gettysburg. Major General J.E.B. Stuart's Confederate cavalry briefly engaged Union militia under Major General William F. "Baldy" Smith at Carlisle and set fire to the Carlisle Barracks. Stuart's cavalry withdrew and arrived at Gettysburg on the second day of the battle, to the perplexity and annoyance of General Robert E. Lee.