Click on the link, below, to each section of the essay.

1. The Lost Order – McClellan takes command of Pope's troops in the aftermath of the Second Battle of Manassas through to the discovery of the Lost Order (August 29 – September 13, 1862).

2. The Battle of South Mountain – The Battle of South Mountain through the eve of the Battle of Antietam (September 14 – September 16, 1862).

3. The Battle of Antietam – The Battle of Antietam (September 17, 1862).

4. McClellan's Bodyguard – The Battle of Shepherdstown, and the aftermath of Lee's Maryland campaign (September 18 – November 10, 1862).

A. Order of Battle – The organization of the opposing armies during the campaign.

B. References – A list of references used to write the essay.