Union Defenders
Commander: Colonel James A. Mulligan
There were about 3,500 Union defenders present during the Battle of Lexington.
3rd Illinois Volunteer Infantry Regiment, "The Irish Brigade" - Colonel James A. Mulligan
14th Missouri Home Guard Regiment - Lt. Colonel Robert White
Lafayette Home Guard Battalion - Major F.W. Becker
- Battery (Two 6-pdr Guns, Two Mortars)
13th Missouri Volunteer Infantry - Colonel Everett Peabody
1st Illinois Volunteer Cavalry - Colonel T.A. Marshall
U.S. Reserve Corps Infantry Battalion - Major R.T. Van Horn
- Battery (Two 6-pdr Guns) - Captain Adams
27th Missouri Mounted Infantry - Lt. Colonel B.W. Grover
Volunteer Cavalry Battalion - Major M.P. Berry
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