| 8th Pennsylvania Regiment | |
|---|---|
| Active | 1776–1781 |
| Allegiance |  Continental Congress |
| Type | Infantry |
| Size | 8 to 9 companies |
| Part of | Pennsylvania Line |
| Engagements |
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| Commanders | |
| Notable commanders |
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The 8th Pennsylvania Regiment or Mackay's Battalion was an American infantry unit that became part of the Continental Army during the American Revolutionary War. Authorized for frontier defense in July 1776, the eight-company unit was originally called Mackay's Battalion after its commander, Colonel Aeneas Mackay. Transferred to the main army in November 1776, the unit was renamed the 8th Pennsylvania Regiment on 1 January 1777. It completed an epic winter march from western Pennsylvania to New Jersey, though Mackay and his second-in-command both died soon afterward. In March 1777 Colonel Daniel Brodhead assumed command. The regiment was engaged at the Battles of Bound Brook, Brandywine, Paoli, and Germantown in 1777. A body of riflemen were detached from the regiment and fought at Saratoga. Assigned to the Western Department in May 1778, the 8th Pennsylvania gained a ninth company before seeing action near Fort Laurens and in the Sullivan Expedition in 1778 and 1779. The regiment consolidated with the 2nd Pennsylvania Regiment in January 1781 and ceased to exist.