Pennsylvania in the Civil War
Pennsylvania provided more men to the Union Army, over 360,000, than any state except New York. "Pennsylvania mustered 215 infantry regiments, as well as dozens of emergency militia regiments that were raised to repel threatened invasions in 1862 and 1863 by the Confederate States Army. Twenty-two cavalry regiments were also mustered, as well as dozens of light artillery batteries." 
The battle of Gettysburg was fought in southeastern Pennyslyvania. Gettysburg is known as the "High Water Mark of the Confederacy." Several smaller battles were "also fought in Pennsylvania during the 1863 Gettysburg Campaign and during an 1864 cavalry raid that culminated in the burning of much of Chambersburg, Pennsylvania. The industrial town of York, Pennsylvania, was the largest city in the North to be occupied by the Confederate States Army during the war." 
Pennsylvania Military Units
Most units were numbered, however, some were named. See the table below for lists of the regiments, battalions, batteries, and unassigned companies.
The information in the lists of Pennsylvania Military Units comes from the Civil War Soldiers and Sailors web site. This web site can also be searched by the name of a soldier.
- Wikipedia.com, Pennsylvania in the American Civil War, (accessed 11 April 2011]