46th Pennsylvania Infantry

46th Pennsylvania Volunteer Infantry
Pennsylvania flag
Active	September 1861 – July 16, 1865
Country	United States
Allegiance	Union
Branch	Infantry
Engagements	First Battle of Winchester Battle of Cedar Mountain Battle of Antietam Battle of Chancellorsville Battle of Gettysburg Battle of Resaca Battle of New Hope Church Battle of Kolb's Farm Battle of Peachtree Creek Battle of Bentonville

The 46th Pennsylvania Volunteer Infantry was a Union Army regiment in the American Civil War. It served in both the Eastern and Western Theaters, most notably at the 1862 Battle of Cedar Mountain and during the 1864 Atlanta Campaign. During the war, the regiment lost 17% of it strength through combat losses and disease.

The regiment was recruited in Allegheny, Berks, Dauphin, Luzerne, Mifflin, Northampton, Northumberland, and Potter counties, and formally mustered into service on September 4, 1861, under the command of Colonel Joseph F. Knipe. At Camp Curtin, in Harrisburg, they were formally accepted into the service of the United States and received their uniforms and equipment. Additionally, they were presented with their regimental colors by Pennsylvania Governor Andrew Curtin.

From late September 1861 through February 1862, the 46th was stationed on the upper Potomac River in Maryland, performing guard and outpost duty in Brig. Gen. Alpheus S. Williams' division, assigned to Maj. Gen. Nathaniel P. Banks' corps. During this time, on September 22, Maj. Arnold Lewis was shot and killed by Pvt. Dennis Lanaghan of Company I while trying to enforce discipline, for which he was sentenced by military court to be executed. He was hanged on December 23 of that year, in front of his gathered brigade.