Military officer; born in
Lancaster, Pa., Sept. 20, 1820; graduated at
West Point in 1841; served through the war with
Mexico; took part in the expedition against the
Rogue River Indians and in the
Utah
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expedition of 1858; appointed brigadier-general of volunteers in 1861; took part in the battles of
Mechanicsville,
Gaines's Mill, and
Glendale.
In the last-named battle he was taken prisoner, but was soon exchanged and returned to duty.
He participated in the
battle of Bull Run, and on Nov. 29, 1862, was promoted to the rank of major-general of volunteers, succeeding
General Hooker in command of the 1st Corps of the Army of the Potomac.
On the first day of the
battle of Gettysburg (July 1, 1863), he was in command of the left wing of the
National army, and was shot dead.
A monument in his honor was erected at
Gettysburg in 1884.