Correction .... From my review "Great cinema, poor history," of the movie "Glory": "If not for the foolish chivalry of Confederate President Jefferson Davis, in not following up their rout of the Union Army at the war's first big battle of Bull Run (called First Manassas in The South) just outside Washington, the war might have ended right then, 500,000 lives saved (including Lincoln's) and the possibility of peaceful emancipation made likely. Most importantly, we would still be a republic in fact and not simply in name."
http://www.amazon.com/exec/obidos/tg/stores/detail/-/dvd/B000051YMQ/customer-reviews/ref=cm_cr_dp_2_1/002-1044140-8452014