Dragoons, with which regiment, up to the breaking out of the war, he
saw frontier service extending from Fort Union, New Mexico, through
to the Pacific coast, and up into Oregon and Washington Territories,
where I knew him slightly. In the fall of 1861 he became colonel of
the Eighth Pennsylvania Cavalry, and a year later was made a
brigadier-general. He then succeeded to the command of a division of
cavalry, and continued in that position till the close of his
service, at times temporarily commanding the Cavalry Corps. He was
the only division commander I had whose experience had been almost
exclusively derived from the cavalry arm.

Wilson graduated in 1860 in the Topographical Engineers, and was
first assigned to duty in Oregon, where he remained till July, 1861.
In the fall of that year his active service in the war began, and he
rose from one position to another, in the East and West, till, while
on General Grant's staff, he was made a brigadier-general in the fall
of 1863 in reward for services performed during the Vicksburg
campaign and for engineer duty at Chattanooga preceding the battle of
Missionary Ridge. At my request he was selected to command the Third
Division. General Grant thought highly of him, and, expecting much
from his active mental and physical ability, readily assented to
assign him in place of General Kilpatrick. The only other general
officers in the corps were Brigadier-General Wesley Merritt,
Brigadier-General George A. Custer, and Brigadier-General Henry E.
Davies, each commanding a brigade.

In a few days after my arrival at Brandy Station I reviewed my new
command, which consisted of about twelve thousand officers and men,
with the same number of horses in passable trim. Many of the general
officers of the army were present at the review, among them Generals