invasion of Maryland and spreads such alarm as to paralyze the movements of McDowell's 40,000 men at Fredericksburg, and to cause the concentration of half of this force, together with Fremont's command, on his rear.
The militia of the adjoining States is called out; troops are hurried to Harper's Ferry in his front; more than 40,000 troops are hastening under the most urgent telegrams to close in around him. Keeping up his demonstrations until the last moment — until, indeed, the head of McDowwell's column was but twelve or fourteen miles from his line of retreat, at a point nearly fifty miles in his rear — he, by a forced march of a day and a half, traverses this distance of fifty miles and places himself at Strasburg.
Here he keeps Fremont at bay until his long line of prisoners and captured stores has passed through in safety and his rear guard closed up. Then he falls back before Fremont, while by burning successively the bridges over the main fork of the Shenandoah he destroys