151st Pennsylvania Infantry

151st Pennsylvania Volunteer Infantry
Photograph of the 151st Pennsylvania's regimental colors, courtesy of Pennsylvania Capitol Preservation Committee
Active	October 24, 1862 – July 27, 1863
Country	United States
Allegiance	Union
Branch	Infantry
Equipment	Springfield Model 1842 (issued at muster-in, Fall 1862) Springfield Model 1861 (issued Winter 1862-63)
Engagements	Battle of Chancellorsville Battle of Gettysburg

The 151st Pennsylvania Infantry was a Union Army regiment serving for a term of nine months during the American Civil War. The regiment sustained seventy-six percent casualties in the Battle of Gettysburg, its only major engagement. Following the war, it became popularly known as "The Schoolteachers' Regiment" due to the presence of at least sixty teachers in the regiment's ranks.

The regiment was recruited from across the Commonwealth of Pennsylvania during the early fall of 1862, with companies raised from the following counties:

The 151st Pennsylvania was formed and mustered into nine months' Federal service at Camp Curtin on the outskirts of the state capital at Harrisburg. On November 4, 1862, the company commanders met to elect regimental officers from among themselves. Harrison Allen, former major of the 10th Pennsylvania Reserve Regiment and captain of Company F, was elected colonel of the regiment. George F. McFarland of Company D was elected lieutenant colonel. John W. Young of Company C was elected major. On November 26, the regiment was issued its equipment and smoothbore muskets, and sent by train to Washington, D.C.

After a halt of a few days in Washington, the 151st Pennsylvania received orders to fall in under the New York brigade of Col. Frederick George D'Utassy. D'Utassy's brigade was composed of the 39th, 111th, 125th, and 126th New York. On December 3, the 151st Pennsylvania and the four New York regiments marched away from Washington toward Union Mills, Virginia on the outer perimeter of Washington's defenses. Posted along Bull Run near the Bull Run battlefield, the regiment stood picket duty and guarded against the partisan guerrillas of Confederate Col. John S. Mosby.