"Company D, 4th Light Armored Reconnaissance Battalion takes its call sign and nickname from the various Virginia Light Horse Troops of the American Revolutionary War. One of the most famous of these units was the 5th Troop, Virginia Light Horse later known as Lee’s Legion or Lee’s Partisan Corps. This unit was commanded by Henry “Light Horse Harry” Lee who was appropriately born close to Marine Corps Base Quantico in nearby Dumfries, Virginia. Henry’s Partisan Corps was known as being elite formations of dragoons and infantry that carried out reconnaissance missions and raids. The Virginia Light Horse served with distinction in both the Northern and Southern campaigns and for a time served as General George Washington’s body guard.
Today Company D, headquartered at Quantico, VA carries on that proud tradition of using combined arms while fighting both mounted and dismounted. Company D, 4th LAR Battalion’s mission is to perform reconnaissance and security missions just as the Virginia Light Horse did during the Revolutionary War. The Marines of Company D have traded the Light Horse for Light Armored Vehicles in performing their mission." USMC web site