The 1st Michigan Infantry in Howard County Service at Annapolis Junction and Laurel, 10/4/1861-2/15/1862 (at least)\\ [[1st Michigan Infantry Sources|Primary Sources]]\\ [[1st Michigan Infantry Secondary Sources|Archival and Secondary Sources]]\\ WIKIPEDIA - "The 1st Michigan Infantry was organized at Detroit, Michigan and mustered into Federal service for a three-year enlistment on September 16, 1861. This regiment retained the number of the original 1st Michigan raised for a three-month enlistment. The regiment was mustered out on July 19, 1865."