From July to November, 1861, Jackson spent the greater part of every day drilling the men under him and in trying to convert them into well-disciplined, obedient troops. During the first week in November he was sent from Manassas to command the Shenandoah Valley district and this meant parting from the soldiers whom he had reason to admire and who in turn held him in highest esteem. A short time later they were destined to reunite under circumstances which would try the courage of the brigade and commander. To the delight of all, the Stonewall Brigade was assigned to Winchester soon after Jackson established his headquarters there and for the next few months rigid training was given them again. About the middle of March 1862, Jackson abandoned Winchester. This was after some of the Union concentration near Manassas and Centreville was broken up and General Banks made no move to offer battle, so the Confederates withdrew without a fight and occupied Strasburg eighteen or twenty miles southward. The evacuation of Winchester was made reluctantly, for good roads in each direction connected the city with outlying districts, fertile farms nearby could furnish the invading army with rations and Banks could receive from or send troops to West Virginia or the army south of Washington. Feeling that Jackson's small force was not of any special danger, Shields' corps was sent in pursuit of the Confederates and most of Banks' troops were ordered to another field. Jackson continued up the Valley and stopped at Mount Jackson, hoping the Federals would follow. The Confederate general learned from Ashby, his cavalry commander, that the enemy was retreating. It was Lee's intention that the Union corps in the Valley be retained there so that assistance could not be offered McClellan, the Northern general who was maneuvering in the eastern part of Virginia with the ultimate aim of striking Richmond. McClellan hoped to attack the capital of the Confederacy by combining his army with that of McDowell, whom he could call to the area of war when necessary. So it was to be Jackson's duty to keep them in the Valley and perhaps to withdraw some of the Northern troops from near Richmond. On March 22nd Ashby with his troopers and a few guns engaged Shields in a skirmish just south of Winchester. He believed there was only a small force of Federals present, so well had Shields hidden his men, and he reported to Jackson that the troops were small in number. The next day Jackson sent reinforcements to Ashby and then followed later with his whole force in the direction of Kernstown which is south of Winchester and but a short distance off. There the battle of Kernstown began and continued until dark. Jackson's troops were defeated and retreated southward. As a result of this encounter Shields was reinforced and the strong Union force remained in the Valley.