The state of New Jersey in the United States provided a source of troops, equipment and leaders for the Union during the American Civil War. Though no major battles were fought in New Jersey, soldiers and volunteers from New Jersey played an important part in the war, including Philip Kearny and George B. McClellan, who led the Army of the Potomac early in the Civil War and unsuccessfully ran for President of the United States in 1864 against his former commander-in-chief, Abraham Lincoln.