Put them in order

i elements in order List details about the Battle of Antietam in correct chronological order. Place the first event to occur at the top of the list. 1 Instructions Robert E. Lee marches into Maryland and divides his troops into four parts, ordering each to move in a different direct General McClellan delays attacking Confederate positions while Lee gathers his troops. Union and Confederate troops fight a bloody battle at Antietam in Maryland; Union forces prevail. Union soldiers find General Lee's battle plans and turn them over to their commander. Failing to invade the North and suffering great losses, Confederate troops retreat to Virginia