The bloodiest day in American history didn't spring up out of nowhere. Prior to the Battle of Antietam, McClellan and the Army of the Potomac had caught up to Robert E. Lee's Army of Northern Virginia at the South Mountain range. One of the clashes that occurred in the prelude to Antietam was at a pass known as Crampton's Gap.

Check out the rest of our Antietam series here:    • Antietam: America's Bloodiest Day  

This episode was produced in partnership with The Gettysburg Museum of History. See how you can support history education & artifact preservation by visiting their website & store at https://www.gettysburgmuseumofhistory...

Support the effort to expand history education on PATREON:   / historyunderground  

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All drone flights conducted by a Part 107 licensed pilot.