105th Pennsylvania Infantry

105th Regiment Pennsylvania Volunteer Infantry
Active	October 1861 to July 11, 1865
Country	United States
Allegiance	Union
Branch	Infantry
Engagements	Battle of Williamsburg Battle of Seven Pines Battle of Glendale Battle of Malvern Hill Battle of Chancellorsville Battle of Gettysburg Battle of the Wilderness Battle of Spotsylvania Court House First Battle of Deep Bottom

The 105th Pennsylvania Volunteer Infantry, also known as the "Wildcat Regiment" was an infantry regiment that served in the Union Army during the American Civil War.

The 105th was raised mainly in the counties of Jefferson, Clarion, and Clearfield. It was organized at Pittsburgh in September and October 1861, and mustered into the U. S. service for a three-year term. Among the early recruits was future United States Congressman Albert C. Thompson.

The regiment was ordered to Washington in October and assigned to the 1st Brigade, 1st Division, III Corps, in Camp Jameson (on the farm of American Revolution patriot George Mason), near Alexandria.

Leaving camp on March 17, 1862, the regiment took part in the siege of Yorktown and the battles of Williamsburg and Fair Oaks. In the latter engagement, the troops fought like veterans, holding their position unsupported until nearly surrounded. Three companies were on special duty at the opening of the action and, being unable to reach the regiment in its exposed position, fought with the 57th Pennsylvania Infantry. After a month spent on picket duty, the 105th was again in action at Glendale and Malvern Hill, and, by the time it reached Harrison's Landing, the ranks were so reduced by wounds and sickness that less than 100 men were fit for active duty.

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