Rosecrans's plan of campaign--Approved by McClellan with modifications--Wagons or pack-mules--Final form of plan--Changes in commands--McClellan limited to Army of the Potomac--Halleck's Department of the Mississippi--Fremont's Mountain Department--Rosecrans superseded--Preparations in the Kanawha District--Batteaux to supplement steamboats--Light wagons for mountain work--Fremont's plan--East Tennessee as an objective--The supply question--Banks in the Shenandoah valley--Milroy's advance--Combat at McDowell--Banks defeated--Fremont's plans deranged--Operations in the Kanawha valley--Organization of brigades--Brigade commanders--Advance to Narrows of New River--The field telegraph--Concentration of the enemy--Affair at Princeton--Position at Flat-top Mountain. CHAPTER XI POPE IN COMMAND--TRANSFER TO WASHINGTON A key position--Crook's engagement at Lewisburg--Watching and scouting--Mountain work--Pope in command--Consolidation of Departments--Suggestions of our transfer to the East--Pope's Order No. 11 and Address to the Army--Orders to march across the mountains--Discussion of them--Changed to route by water and rail--Ninety-mile march--Logistics--Arriving in Washington--Two regiments reach Pope--Two sent to Manassas--Jackson captures Manassas--Railway broken--McClellan at Alexandria--Engagement at Bull Run Bridge--Ordered to Upton's Hill--Covering Washington--Listening to the Bull Run battle--Ill news travels fast. CHAPTER XII RETREAT WITHIN THE LINES--REORGANIZATION--HALLECK AND HIS SUBORDINATES McClellan's visits to my position--Riding the lines--Discussing the past campaign--The withdrawal from the James--Prophecy--McClellan and the soldiers--He is in command of the defences--Intricacy of official relations--Reorganization begun--Pope's army marches through our works--Meeting of McClellan and Pope--Pope's characteristics--Undue depreciation of him--The situation when Halleck was made General-in-Chief--Pope's part in it--Reasons for dislike on the part of the Potomac Army--McClellan's secret service--Deceptive information of the enemy's force--Information from prisoners and citizens--Effects of McClellan's illusion as to Lee's strength--Halleck's previous career--Did he intend to take command in the field?--His abdication of the field command--The necessity for a union of forces in Virginia--McClellan's inaction was Lee's opportunity--Slow transfer of the Army of the Potomac--Halleck burdened with subordinate's work--Burnside twice declines the command--It is given to McClellan--Pope relieved--Other changes in organization--Consolidation--New campaign begun. CHAPTER XIII SOUTH MOUNTAIN