Modest and unassuming in his personality, he demonstrated from the first his skill as an organizer and his power in the conception and execution of far-reaching strategy.
From the moment he breathed his spirit into the army he made it a rapid, compact, accurate and terrible engine of war. The contemptible assault of the Richmond Examiner fell harmless from the armor of his genius. Davis was bitterly denounced for his favoritism in passing G. W. Smith and appointing Governor Letcher's pet. He was accused of playing a game of low politics to make "a spawn of West Point" the next Governor of Virginia. But events moved with a pace too swift to give the yellow journals or the demagogues time to get their breath.
Lee had sent Jackson into the Valley of the Shenandoah to make a diversion which might hold the armies moving on the Capital from the west and at the same time puzzle McDowell at Fredericksburg.
Lee, Jackson and Davis were three men who worked in perfect harmony from the moment they met in their first council of war at the White House of the Confederacy. So perfect was Lee's confidence in Jackson, he was sent into the Valley unhampered by instructions which would interfere with the execution of any movement his genius might suggest.
Left thus to his own initiative, Jackson conceived the most brilliant series of engagements in the history of modern war. He determined to use his infantry by forced marches to cover in a day the ground usually made by cavalry and fall on the armies of his opponents one by one before they could form a juncture.
On May 23, by a swift, silent march of his little army of fifteen thousand men, he took Banks completely by surprise, crushed and captured his advance guard at Fort Royal, struck him in the flank and drove him back into Strassburg, through Winchester, and hurled his shattered army in confusion and panic across the Potomac on its Washington base.
Desperate alarm swept the Capital of the Union. Stanton, the Secretary of War, issued a frantic appeal to the Governors of the Northern States for militia to defend Washington. Panic reigned in the cities of the North. Governors and mayors issued the most urgent appeals for enlistments.
Fremont was ordered to move with all possible haste and form a juncture with a division of McDowell's army and cut off Jackson's line of retreat.
The wily Confederate General wheeled suddenly and rushed on Fremont before Shields could reach him. On June 8, at Cross Keys, he crushed Fremont, turned with sudden eagle swoop and defeated Shields at Port Republic.
Washington believed that Jackson commanded an enormous army, and that the National Capital was in danger of his invading host. The defeated armies of Milroy, Banks, Fremont and Shields were all drawn in to defend the city.