by Hunter,
who in the meantime had arrived at Harper's Ferry by the Baltimore
and Ohio railroad. From Leesburg Early retired through Winchester
toward Strasburg, but when the head of his column reached this place
he found that he was being followed by General Crook with the
combined troops of Hunter and Sigel only, Wright having returned to
Washington under orders to rejoin Meade at Petersburg. This
reduction of the pursuing force tempting Early to resume the
offensive, he attacked Crook at Kernstown, and succeeded in
administering such a check as to necessitate this general's retreat
to Martinsburg, and finally to Harper's Ferry. Crook's withdrawal
restored to Early the line of the upper Potomac, so, recrossing this
stream, he advanced again into Maryland, and sending McCausland on to
Chambersburg, Pennsylvania, laid that town in ashes, leaving three
thousand non-combatants without shelter or food.

When Early fell back from the vicinity of Washington toward
Strasburg, General Grant believed that he would rejoin Lee, but later
manoeuvres of the enemy indicated that Early had given up this idea,
if he ever, entertained it, and intended to remain in the valley,
since it would furnish Lee and himself with subsistence, and also
afford renewed opportunities for threatening Washington. Indeed, the
possession of the Valley of the Shenandoah at this time was of vast
importance to Lee's army, and on every hand there were indications
that the Confederate Government wished to hold it at least until
after the crops could be gathered in to their depots at Lynchburg and
Richmond. Its retention, besides being of great advantage in the
matter of supplies, would also be a menace to the North difficult for
General Grant to explain, and thereby add an element of considerable
benefit to the Confederate cause; so when Early's troops again
appeared at Martinsburg it was necessary for General Grant to
confront them with a force strong enough to put an end to incursions
north of the Potomac, which hitherto had always led to National
discomfiture at some critical juncture, by turning our army in
eastern Virginia from its chief purpose--the destruction of Lee and
the capture of the Confederate capital.

This second irruption of Early, and his ruthless destruction of
Chambersburg led to many recommendations on the part of General Grant
looking to a speedy elimination of the confusion then existing among
the Union forces along the upper