On June 3rd Lee put his army in motion northward, with Ewell’s Corps, preceded by Jenkins’ and Imboden’s Cavalry, in the advance, followed by Longstreet and lastly by Hill. Longstreet moved on the east side of the Blue Ridge in order to lead Hooker to believe that Washington would be threatened. On reaching Snicker’s Gap, he crossed the Ridge into the Shenandoah Valley and followed Hill, who was now in advance. The great army was strung out from Fredericksburg, Va., on the south to Martinsburg, W. Va., on the north, with the cavalry division under Stuart guarding the gaps along the Blue Ridge. [Illustration: Since 1863 the population of Gettysburg has increased from 2,000 to 5,500] After driving out Union forces stationed at Winchester under Milroy, Lee’s Army crossed the Potomac at Williamsport and Shepherdstown on June 23rd, 24th, and 25th, and advanced northward, unopposed, through the Cumberland Valley, toward Harrisburg. Hooker’s Plan. On June 10th, Hooker proposed to President Lincoln that he cross the Rappahannock and attack Hill, who still remained, and then move south, threatening Richmond. He thought this might divert Lee from his invasion of the North. In reply Lincoln said: “_I think Lee’s Army and not Richmond is your sure objective point._” The Appointment of Meade. Thereupon Hooker started in pursuit of Lee on June 13th, moving east of the Blue Ridge on a line parallel with Lee on the west, with the cavalry guarding his left. He thus protected Baltimore and Washington. He crossed the Potomac at Edward’s Ferry on the 25th and 26th and reached Frederick on the 27th, where he halted. Believing himself handicapped by orders from General Halleck, Chief in Command at Washington, who refused the use of the Union forces at Harper’s Ferry, he asked to be relieved of the command of the Army of the Potomac. The request was granted, and, on June 28th, Major-General George G. Meade, in command of the 5th Corps, was appointed his successor, Sykes taking command of General Meade’s Corps. Advance of Lee. Lee’s Army had been steadily moving northward in the Cumberland Valley. Ewell, in the advance, detached Early’s Division on reaching Chambersburg, directing him to move through Gettysburg on June 26th and thence to York and Wrightsville, there to cross the Susquehanna to Columbia and move up to Harrisburg to meet the divisions of Rodes and Johnson. Rodes reached Carlisle on June 28th, accompanied by Ewell; Johnson was at Greenvillage, between Chambersburg and Carlisle. Hill moved from Chambersburg to Cashtown, and Longstreet was in the rear at Chambersburg. Lee’s headquarters were in Messersmith’s Woods near Chambersburg. [Illustration: General Reynolds’ position shortly before his death.—Near General Buford’s statue, pointing toward the spectator, is the first gun fired by the Union forces]