After the battle of Bull Run the Union army was broken up and unorganized. General George B. McClellan was called to Washington to take charge of the army, and in the beginning days of 1862 he found himself in command of 200,000 men. He set about to organize this army and fit them for service. Presently public opinion grew restless, and the North became tired of "All's Quiet Along the Potomac." About the middle of March McClellan moved a large portion of his army on transports down the Potomac to Fortress Monroe. On April 5th he moved up the Peninsula toward Richmond. He met with a Confederate force under General Magruder near Yorktown, who fell back on Williamsburg as the Union army advanced. At Williamsburg he met a large Confederate force under General J. E. B. Stuart, D. H. Hill and Jubal Early. The Confederates were finally dislodged and forced to retreat by the advance divisions of McClellan's army under Hooker, Kearny and Hancock, who occupied Williamsburg. The Union army continued their march, and on May 16th reached White House, the ancestral home of the Lees, which is twenty-four miles from Richmond. On every side were fields of grain, and were it not for the presence of 100,000 men, there was the promise of a full harvest. Great confusion reigned at the Confederate capital on hearing of the advance of McClellan's army. The Confederate army, known as the Army of Northern Virginia, under the command of General Joseph E. Johnston, was arrayed against McClellan's army, known as the Army of the Potomac. And thus was arrayed against each other two of the greatest and best equipped armies that had ever confronted each other on the field of battle. It was now imminent that this would be the beginning of a series of battles between the Army of the Potomac and the Army of Northern Virginia, ending three years thereafter at Appomattox, where the veterans in gray layed down their arms, in honor, to those in blue. Between these two armies lay the Chickahominy River, which at this time was overflowing its banks on account of recent heavy rains. McClellan ordered his army forward May 20th, and a large division under General Naglee succeeded in crossing the river, and took up a position on the south side of the stream. General McClellan, however, was expecting to be reënforced by McDowell from Fredericksburg with 40,000 men.