Fort Union Historic Resource Study

Regular Army

Third Infantry, 1851-1856, 1860
First Dragoons, 1851-1856 (became First Cavalry in 1861)
Second Artillery, 1852-1855
Second Dragoons, 1853-1854, 1861 (became Second Cavalry in 1861)
Mounted Riflemen, 1856-1861 (became Third Cavalry in 1861)
Eighth Infantry, 1858, 1860
Second Cavalry, 1861-1862
Third Cavalry, 1861-1862, 1866-1870
Fifth Infantry, 1861-1867
Tenth Infantry, 1861, 1884-1891
First Cavalry, 1862-1863
Seventh Infantry, 1862-1864
Third Artillery, 1858, 1865-1866
Fifty -Seventh Colored Infantry, 1866
Thirty-Seventh Infantry, 1867-1869
Eighth Cavalry, 1870-1876
Fifteenth Infantry, 1870-1881
Ninth Cavalry, 1876-1881
Twenty-Third Infantry, 1881-1884
Ninth Infantry, 1886-1887
Sixth Cavalry, 1886-1890

Volunteer Troops

First New Mexico Volunteer Infantry, 1861, 1863-1866
First New Mexico Volunteer Cavalry, 1861, 1865-1866
Fourth New Mexico Volunteer Infantry, 1861-1862
New Mexico Militia, 1861-1862
Spies and Guides, New Mexico Volunteers, 1861-1862
First Colorado Volunteer Infantry, 1862
Second Colorado Volunteer Infantry, 1862-1863
Ninth Wisconsin Battery of Light Artillery, 1862
Kansas Volunteers, 1862
First California Volunteer Cavalry, 1863-1866
First California Volunteer Infantry, 1863-1865
Eleventh Missouri Volunteer Cavalry, 1863-1864
First California Veteran Volunteers, 1865

1. Compiled from Post Returns, Fort Union, 1851-1891, AGO, RG 94, NA.