One of the most unusual, and little known, military organizations in the United States is "The Centennial Legion of Historic Military Command," composed of some 100 military units � ranging from active elements of the National Guard to veterans' associations � that have been in existence for a century of more.
The formation of the Legion came about as a consequence of the celebration of the Centennial of the American Revolution. At the commemorative observances in Massachusetts in 1875, Maj. George W. McLean, Commander of the Old Guard of the City of New York, chanced to meet Capt. Robert C. Gilchrist, of Charleston's Washington Light Infantry. From this meeting grew the notion of forming an organization of historic military units from the original thirteen states to honor the memory of the Revolutionary past, and, not incidentally, to help heal the wounds of the only recently concluded Civil War. Moving with surprising speed, the Legion was organized on July 4, 1876, at Philadelphia, in conjunction with the centennial celebration of the Declaration of Independence, inaugurating its existence with a great parade that included not only the member units of the newly formed Legion, but also many other militia units� including two companies of black men � from all over the country, as well as the cadets of the U.S. Military Academy and a battalion of Marines.
Since that first parade, the Centennial Legion has grown considerably. To qualify for membership, a unit has to be at least 100 years old, and to have originated in the one of the thirteen original states.
Some units are still on active duty as members of the National Guard. Other units are active in the state guard. Still others remain active under state militia laws, or are privately chartered non-profit making organizations. Many of them perform ceremonial functions. The foot and horse guard units in Connecticut, for example, which are the governor's formal escort, as is New York's Veteran Corps of Artillery, while that state's Old Guard � City of New York is the mayor's official escort. And such ceremonial units have often played roles in the nation's wars, supplying cadres for state defense force units during both world wars, sending members into active duty, and so forth.
Units of the Centennial Legion |
| Years | State | Unit (Formerly) ** |
| 1636 | Mass. | 1st/182nd Inf. (North Regiment of Massachusetts) |
* | 1638 | Mass. | Ancient and Honorable Artillery Company of Massachusetts |
| 1652 | Va. | 1st/176th Inf. (1st Va. Regiment) |
| 1672 | Conn. | HQ-1st/169th Inf. (1st Connecticut Regiment of Militia) |
| 1672 | Conn. | 1st/192nd FA (Regiment of Fairfield County) |
| 1726 | Mass. | 125th Signal Bn.(First Corps of Cadets) |
| 1736 | Mass. | Massachusetts National Lancers |
| 1739 | Conn. | 102nd Inf. (2nd Connecticut Regiment of Militia) |
* | 1741 | R.I. | Artillery Company of Newport, R.I.M. |
* | 1747 | Pa. | Veteran Guard, 3rd Infantry, Pennsylvania |
* | 1747 | Pa. | Veteran Corps, 1st Infantry Regiment, Pennsylvania |
* | 1771 | Conn. | 1st Company, Governor's Foot Guards |
| 1773 | Mass. | Lexington Minutemen |
* | 1774 | Md. | 1st/175th Inf. (5th Maryland) |
| 1774 | Pa. | 1st Troop, Philadelphia City Cavalry |
| 1774 | R.I. | Gloucester Light Infantry, R.I.M. |
* | 1774 | R.I. | Kentish Guards, R.I.M. |
| 1774 | R.I. | Pawtuxet Rangers, R.I.M. |
| 1775 | Mass. | Acton Minutemen |
| 1775 | Mass. | Bedford Minutemen |
| 1775 | Mass. | 1st/101st FA (Second Corps of Cadets) |
* | 1775 | N.H. | 2nd Co., 1st New Hampshire Regt. |
| 1775 | R.I. | Varnum Continentals (1st Co., James M. Varnum's Regt.) |
* | 1775 | Conn. | 2nd Company, Governor's Foot Guards |
| 1776 | Conn. | Shelton's Co., 1st Continental Light Dragoons |
| 1776 | Del. | H.Q., 198th Signal Bn. (1st Delaware Regt, American Rifles Association) |
* | 1776 | R.I. | Bristol Train of Artillery, R.I.M. |
| 1777 | Conn. | 3rd Connecticut Regt., Continental Line |
| 1777 | Pa. | 103rd Engr. Bn, Colonial Company |
* | 1778 | Conn. | 1st Company, Governor's Horse Guards |
| 1785 | Mass. | Second Corps of Cadets Veterans' Company |
* | 1786 | Ga. | Chatham Artillery Corporation |
| 1787 | Mass. | Fusilier Veterans' Corps |
| 1786 | N.Y. | 9th Regt, New York Guard |
* | 1789 | Va. | 183rd Armor (Richmond Light Artillery Blues) |
* | 1790 | N.Y. | Veteran Corps of Artillery |
| 1790 | R.I. | Cranston Blues, R.I.M. |
| 1792 | Pa. | Washington Infantry of Pittsburgh |
| 1793 | N.C. | Fayetteville Independent Light Infantry Company |
| 1797 | -- | Ship's Company, U.S.S. Constitution |
| 1797 | -- | Marine Detachment, U.S.S., Constitution |
| 1798 | Mass. | Boston Light Infantry |
| 1798 | R.I. | Federal Blues, R.I.M. |
| 1802 | Ga. | Savannah Volunteer Guards |
* | 1807 | S.C. | Washington Light Infantry |
| 1808 | Conn. | 2nd Company, Governor's Horse Guards |
| 1808 | N.Y. | Utica Citizens' Corps |
| 1809 | N.Y. | 258th FA (Washington Grays) |
| 1813 | Pa. | State Fencibles Infantry |
| 1816 | Conn. | New Haven Grays |
| 1818 | R.I. | 1st Light Infantry Regiment, R.I.M. |
| 1819 | Pa. | Old Guard State Fencibles |
| 1819 | S.C. | Sumter Guards of Charleston |
* | 1826 | N.Y. | Old Guard of the City of New York |
| 1828 | Va. | Norfolk Light Artillery Blues |
| 1833 | N.J. | Pulaski Cadets of America |
| 1833 | N.Y. | Pulaski Militia of America |
| 1840 | Pa. | 108th Combat Support Hospital (2nd Pennsylvania) |
| 1846 | N.Y. | 69th Infantry (165th Inf., 69th New York) |
| 1847 | N.Y. | 1st/187th FA |
| 1848 | N.Y. | 187th Signal Bde (Columbian Rifles) |
| 1852 | Ga. | Clinch Rifles |
| 1853 | Mass. | Boston Light Artillery |
| 1854 | Ga. | Old Guard Battalion of the Gate City Guard |
* | 1854 | N.H. | Amoskrag Veterans |
* | 1855 | Ga. | Gate City Guard |
* | 1856 | Pa. | Old Guard of the City of Philadelphia |
| 1857 | Mass. | Veteran Association of the Lawrence Light Guard of Medford |
| 1858 | Conn. | Putnam Phalanx |
| 1859 | N.Y. | Veterans of the 7th Regiment, N.Y.N.G. |
| 1860 | Ga. | 1st Volunteer Regiment of Georgia |
| 1861 | Conn. | 1st Regiment, Connecticut Volunteer Cavalry |
| 1861 | Mass. | 5th Massachusetts Battery, Light Artillery, Army of the Potomac |
| 1862 | N.Y. | 1st/47th New York Guard (47th N.Y.S.M.) |
| 1866 | Mass. | 2nd Corps of Cadets Veterans' Association |
| 1867 | N.Y. | 2nd/104th FA |
| 1868 | N.J. | Phil Kearny Guards |
| 1869 | N.Y. | Veteran Association of the 71st Regiment, N.G.S.N.Y. |
| 1871 | N.Y. | Veterans of the 9th Regiment |
| 1874 | N.Y. | Veteran Association of the 13th Regiment, 59th FA, 245th CA, N.Y.N.G. |
| 1874 | N.Y. | Veterans' Association, 8th Regt, Infantry, N.Y.N.G. |
| 1874 | N.Y. | Veterans' Corps, 69th Regt. |
| 1876 | Conn. | Co. A, 1st/102nd Inf. (New Haven Grays) |
| 1876 | Mass. | Veteran Association, 1st Corps of Cadets |
| 1876 | Mass. | Worcester Continentals |
| 1883 | N.J. | Pulaski Cadets |
| 1883 | N.Y. | Veterans' Association of the 12th Infantry, N.Y.N.G. |
| 1884 | N.Y. | 101st Cavalry Veterans Association |
| 1885 | N.Y. | Squadron A Association [101st Cavalry] |
| 1886 | N.Y. | 101st Signal Bn. |
| 1887 | N.J. | Morris Guard |
| 1888 | Md. | Veteran Corps, 5th Regt. of Infantry |
| 1890 | N.J. | Essex Troop |
| 1895 | N.Y. | Squadron C Cavalry Association [101st Cavalry] |
* Charter Members |
** Most member units are known by their traditional name. |