134th Pennsylvania Infantry

134th Pennsylvania Volunteer Infantry
Pennsylvania flag
Active	August 1862 to May 26, 1863
Country	United States of America
Allegiance	Union
Branch	Infantry
Part of	1st Brigade, 3rd Division, V Corps, Army of the Potomac
Engagements	Second Battle of Bull Run Battle of Antietam Battle of Chancellorsville
Commanders
Notable commanders	Matthew Quay Edward O'Brien

The 134th Pennsylvania Volunteer Infantry was an infantry regiment in the Union Army during the American Civil War.

After a call for volunteers in July 1862 by Andrew Curtin, Governor of Pennsylvania, the 134th Regiment was mustered in for nine months of service. The companies were from the following counties:

Most of the men had no prior military service. Some had served in the Mexican-American War, but many were fresh recruits. After being trained at Camp Curtin, they were moved to Washington D.C. on August 20, 1862, following the Confederate advance on the capital during the Northern Virginia Campaign. After one day at Washington, they were moved to Arlington Heights, where they engaged in drill and other duties. They joined a brigade with the 91st, 126th, and 129th Pennsylvania regiments, under the command of General Erastus B. Tyler. It was here that the organization of the regiment was completed. For the field officers, Matthew Quay of Beaver County was commissioned as colonel, Edward O'Brien of Lawrence County as lieutenant colonel, and John M. Thompson of Butler County as major.

On August 30, the 134th marched towards Manassas, Virginia, but arrived too late to participate in the Second Battle of Bull Run. The men returned to camp and were put in the defenses. On September 13, Tyler's Brigade, as part of the Third Division, V Corps, marched towards South Mountain in central Maryland. It arrived near Sharpsburg, Maryland, on the 18th, but had arrived too late to participate in the Battle of Antietam.