Retirement of the Army.--Remnants of Grant's Army.--Its Reënforcements.--Strength of our Army.--Strength of Grant's Army.-- Reorganization.--Corinth.--Advance of General Halleck.--Siege of Corinth.--Evacuation.--Retreat to Tupelo.--General Beauregard retires.-General Bragg in Command.--Positions on the Mississippi River occupied by the Enemy.--New Madrid.--Island No. 10.--Fort Pillow.--Memphis.--Attack at Hatteras Inlet.--Expedition of the Enemy to Port Royal.--Expeditions from Port Royal.--System of Coast Defenses adopted by us.--Fort Pulaski. CHAPTER XX. Advance of General McClellan toward Centreville; his Report.--Our Forces ordered to the Peninsula.--Situation at Yorktown.--Siege by General McCellan.--General Johnston assigned to Command; his Recommendation.--Attack on General Magruder at Yorktown.--Movements of McClellan.--The Virginia.--General Johnston retires.--Delay at Norfolk.--Before Williamsburg.--Remark of Hancock.--Retreat up the Peninsula.--Sub-terra Shells used.-Evacuation of Norfolk.--Its Occupation by the Enemy. CHAPTER XXI. A New Phase to our Military Problem.--General Johnston's Position.-- Defenses of James River.--Attack on Fort Drury.--Johnston crosses the Chickahominy.--Position of McClellan.--Position of McDowell.-- Strength of Opposing Forces.--Jackson's Expedition down the Shenandoah Valley.--Panic at Washington and the North.--Movements to intercept Jackson.--His Rapid Movements.--Repulses Fremont.-- Advance of Shields.--Fall of Ashby.--Port Republic, Battle of.-- Results of this Campaign. CHAPTER XXII. Condition of Affairs.--Plan of General Johnston.--The Field of Battle at Seven Pines.--The Battle.--General Johnston wounded.-- Advance of General Sumner.--Conflict on the Right.--Delay of General Huger.--Reports of the Enemy.--Losses.--Strength of Forces.--General Lee in Command. CHAPTER XXIII. The Enemy's Position.--His Intention.--The Plan of Operations.-- Movements of General Jackson.--Daring and Fortitude of Lee.-- Offensive-Defensive Policy.--General Stuart's Movement.--Order of Attack.--Critical Position of McClellan.--Order of Mr. Lincoln creating the Army of Virginia.--Arrival of Jackson.--Position of the Enemy.--Diversion of General Longstreet.--The Enemy forced back south of the Chickahominy.--Abandonment of the Railroad. CHAPTER XXIV. Retreat of the Enemy.--Pursuit and Battle.-Night.--Further Retreat of the Enemy.--Progress of General Jackson.--The Enemy at Frazier's Farm.--Position of General Holmes.--Advance of General Longstreet.-- Remarkable Features of the Battle.--Malvern Hill.--Our Position.--The Attack.--Expedition of General Stuart.--Destruction of the Enemy's Stores.--Assaults on the Enemy.--Retreat to Westover on the James.-- Siege of Richmond raised.--Number of Prisoners taken.--Strength of our Forces.--Strength of our Forces at Seven Pines and after.--Strength of the Enemy. CHAPTER XXV.