He reached Gettysburg on 30 June and was riding at the head of the column when they spotted the first elements of the Confederate Army of Northern Virginia and began the Battle of Gettysburg on the morning of 1 July.
Han nåede Gettysburg den 30. juni og red forrest i kolonnen da de opdagede de første enheder i den konfødererede Army of Northern Virginia og indledte Slaget ved Gettysburg om morgenen den 1. juli.