19 CDVs, each approx. 2 1/4 x 3 1/2 in. or smaller, on cardstock mounts. Most identified in pencil on recto and/or verso, including:

Lieutenant Colonel [Walter] King (pictured in vignetted bust portrait, wearing lieutenant colonel's shoulder straps), enlisted as a lieutenant colonel on 2/1/62 and commissioned into the 4th MO State Militia Cavalry. -- Lieutenant Colonel William C. LeFever (pictured in vignetted bust portrait wearing major's or lieutenant colonel's shoulder straps), enlisted as a captain on 2/1/62 and commissioned into the 4th MO State Militia Cavalry. Promoted to major on 11/6/64 as of the 13th MO Cavalry. Promoted to lieutenant colonel on 2/3/65. -- Captain William D. Blair (pictured in oval bust portrait, wearing captain's shoulder straps), enlisted as a lieutenant on 2/1/62 and commissioned into the 4th MO State Militia Cavalry. Promoted to captain, date unknown. KIA on 10/23/64 at Big Blue, MO. -- Captain [John] Cross (pictured in full seated portrait, wearing first lieutenant's shoulder straps), enlisted as a first lieutenant on 3/29/62 and commissioned into 14th MO State Militia Cavalry. Transferred to the 4th MO State Militia Cavalry on 3/3/63. Promoted to captain, date unknown. -- Captain [Walter] Hamilton (pictured in full standing studio portrait, wearing long frock coat with first lieutenant's shoulder straps), enlisted as a first lieutenant on 2/1/62 and commissioned into the 4th MO State Militia Cavalry. Promoted to captain, date unknown. WIA severely in left forearm (amputated) on 10/22/64 at Big Blue, MO, and discharged for wounds on 5/1/65. -- Captain [Albert] Roecker (pictured in vignetted bust portrait wearing captain's shoulder straps), enlisted as a first lieutenant on 2/1/62 and commissioned into the 4th MO State Militia Cavalry. Promoted to captain, date unknown. --
Captain Franklin Swap (pictured in vignetted bust portrait, wearing indecipherable shoulder straps), enlisted as a captain on 2/1/62 and commissioned into 4th MO State Militia Cavalry. -- First Sergeant Frank Remelins (pictured in full seated studio portrait wearing 3 chevrons and a lozenge on his jacket sleeves), enlisted as a sergeant on 2/1/62 and mustered into the 4th MO State Militia Cavalry. -- Surgeon James H. Shoot (pictured in vignetted bust portrait, wearing a double-breasted frock coat and medical shoulder straps. Tureman & Vandeventer, Booneville, MO backmark), enlisted as a surgeon in 2/1/62 and commissioned into the 4th MO State Militia Cavalry. -- And 10 others including Quartermaster David Bonham Jr., First Lieutenant Robert P. Ruley, First Lieutenant Robert J. D. Stephens, First Lieutenant Isaac N. Albin, and Second Lieutenant James M. Gavin. -- Together, 19 CDVs.

The 4th Missouri State Militia Cavalry was organized at St. Joseph, Missouri, where it remained until August of 1862 for fitting out. The regiment skirmished on the Little Blue River on 2 June 1862 and then were involved in the pursuit of Colonel John T. Coffee's regiment until September. Notably, the regiment was assigned to the District of Central Missouri, Dept. of Missouri in December until 25 January 1863, during which time it defended Springfield from General John S. Marmaduke's attack on 8 January. Two regiment members were killed. The regimentwas transferred to the District of the Border in August of 1863 and was involved in the pursuit of Quantrill's Raiders from 20-28 August, and operations against General Joseph Shelby from 22 September - 26 October, including actions at Tipton, Syracuse on 10 October, Boonville on 11-12 October, Merrill's Landing and Dug Ford on 12 October, and Marshall, Arrow Rock, and Blackwater on 13 October.

In January 1864, the regiment was transferred to District of 
Central Missouri, and was involved in action near Warrensburg, Johnson County on 22-24 February, and in pursuit of General Price's Army, including actions at Moreau Creek Bottos of 7 October, California on 9 October, Boonville on 9-12 October, Little Blue River on 21 October, and West Port on 23 October. After Price's defeat, the 4th engaged in continuing action at Mine Creek. Mine Creek was the only full-scale battle between regular troops fought on Kansas soil, and possible the largest of all cavalry battles of the war.

Most of the regiment mustered out at St. Louis in April of 1865, after moving to Fort Scott, Kansas to recover, and then being stationed at Sedalia, Missouri from November 1864 until April 1865.