Gen. Robert E. Lee led his Army of North Virginia only two times into the North throughout the American Civil War. The winner of the first battle was inconclusive; the second determined the winner of the war.   The first battle fought on northern soil took place in September 1862, when Gen. Robert E. Lee's army invaded Maryland. It was near Antietam Creek in Sharpsburg, Maryland where his Army of Northern Virginia was confronted by Maj. Gen. George McClellan's Army of the Potomac. Fierce...