@natgeo Photograph by @cookjenshel The Battle of Antietam began at dawn on September 17, 1862. It remains the bloodiest single day in American military history – 23, 000 lives were lost. The sycamore tree, at the end of the Burnside Bridge is the last living witness of that battle – and is part of our Wise Trees project. The battle was a turning point in the Civil War, providing impetus for President Lincoln to issue the Emancipation Proclamation. @thephotosociety @natgeocreative #WiseTrees #BattleofAntietam #CivilWar #AntietamNationalBattlefield by natgeo

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