Maryland -- The Confederate invasion of Maryland -- The Confederate Army crosses the Potomac -- General McClellan and the Army of the Potomac -- The advance of the Army of the Potomac from Washington to Frederick and South Mountain -- Harper's Ferry -- South Mountain (Crampton's Gap) -- South Mountain (Turner's Gap) -- From South Mountain to the Antietam -- McLaws and Franklin in Pleasant Valley -- The field of Antietam -- The prelude to Antietam -- The Union and Confederate armies -- The battle on the Union right and Confederate left : daybreak to 7:30 a.m -- The battle on the Union right and Confederate left : 7:30 a.m. to 9:00 a.m -- The West Woods and the Dunkard Church -- The Sunken Road ("Bloody Lane") -- The Dunkard Church -- The Middle Bridge, the Fifth Corps, and the advance of Pleasanton's cavalry division -- The Rohrbach (Burnside) Bridge -- General Lee recrosses the Potomac -- Shepherdstown Ford -- The results of the Maryland campaign -- Lincoln and McClellan -- Appendix A: organization of the Army of the Potomac in the Maryland campaign -- Appendix B: organization of the Army of Northern Virginia in the Maryland campaign -- Appendix C: "my Maryland" -- Appendix D: Union losses at Maryland Heights and Harper's Ferry -- Appendix E: the surrender of Harper's Ferry -- Appendix F: Union losses at Crampton's Gap -- Appendix G: Confederate losses at Crampton's Gap -- Appendix H: Union losses at Turner's Gap and Fox's gap -- Appendix I: Confederate losses at Turner's Gap and Fox's Gap -- Appendix J: strength of the Union and Confederate armies at Antietam -- Appendix K: the mortal wounding of General Mansfield -- Appendix L: casualties in the Union and Confederate armies at Antietam -- Appendix M: Union losses in the Maryland campaign -- Appendix N: Confederate losses in the Maryland campaign -- Appendix O: the British perspective.