Antietam+National+Battlefield+is+the+site+of+the+bloodiest+one+day+battle+in+American+history%2e+After+twelve+hours+of+savage+combat+on+September+17%2c+1862%2c+23%2c000+soldiers+were+killed%2c+wounded+or+missing%2e+The+Battle+of+Antietam+ended+the+Confederate+Army+of+Northern+Virginia%27s+first+invasion+into+the+North+and+led+to+Abraham+Lincoln%27s+issuance+of+the+preliminary+Emancipation+Proclamation%2e+Rohrbach+Campground+is+part+of+the+Antietam+National+Battlefield%2e+It+is+a+walk%2din%2c+primitive+camping+area+available+to+scouts+and+civic+organization+groups+only+%28see+%22Know+Before+You+Go%2c%22+below%2c+for+individual+camping+options+in+the+area%29%2e+The+campground+has+10+sites%2c+each+of+which+is+provided+with+a+fire+ring+and+picnic+tables+and+space+to+accommodate+a+maximum+of+30+people%2e+The+campground+is+typically+open+from+March+through+the+last+weekend+in+November%2e%0d%0a