The men of both armies were comparatively raw levies, highly susceptible to the influence of "surprise," and the appearance of an enemy on their flanks, or in their rear, was calculated to throw them into disorder.

The wooded character of the theatre of war generally rendered such movements practicable, and all that was requisite was a certain amount of daring in the commander who was called upon to decide upon them.

This daring Lee repeatedly exhibited, and the uniform success of the movements indicates his sound generalship.
To command the force which was now to go on the perilous errand of striking General Pope's rear, General Lee selected Jackson, who had exhibited such promptness and decision in the campaigns of the Valley of Virginia.

Rapidity of movement was necessary above all things, and, if any one could be relied upon for that, it was the now famous Stonewall Jackson.

To him the operation was accordingly intrusted, and his corps was at once put in motion.