This roster includes the known officers and enlisted men of the 100th Indiana Infantry (Three Years’ Service), organized by Field & Staff and Companies A through K. Information is drawn from 19th-century state adjutant general reports, the Official Records, and verified regimental histories.
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For an overview of this regiment’s organization, service, engagements, and casualties, see the regiment summary page.
Research This Regiment
If you’re researching ancestors in the 100th Indiana Infantry (Three Years’ Service), these resources may provide additional historical detail, including regimental histories and Civil War reference works.
Field & Staff
- Colonel Charles Case – Original commanding officer; service details in regimental and state records.
- Colonel Sanford I. Stoughton – Promoted from Lieutenant Colonel; service details in regimental and state records.
- Colonel Albert Heath – Promoted from Lieutenant Colonel; service details in regimental and state records.
- Colonel Ruel M. Johnson – Promoted from Major and Lieutenant Colonel; service details in regimental and state records.
- Lieutenant Colonel Albert Heath – Promoted; service details in regimental and state records.
- Lieutenant Colonel Ruel M. Johnson – Promoted; service details in regimental and state records.
- Lieutenant Colonel John W. Headington – Promoted; service details in regimental and state records.
- Major Robert Parrott – Service details in regimental and state records.
- Major Ruel M. Johnson – Service details in regimental and state records.
- Major John W. Headington – Service details in regimental and state records.
- Major William H. Vernamon – Service details in regimental and state records.
Company A
Records for this company are incomplete in the surviving state adjutant general reports.
Company B
Records for this company are incomplete in the surviving state adjutant general reports.
Company C
Records for this company are incomplete in the surviving state adjutant general reports.
Company D
Records for this company are incomplete in the surviving state adjutant general reports.
Company E
Records for this company are incomplete in the surviving state adjutant general reports.
Company F
Records for this company are incomplete in the surviving state adjutant general reports.
Company G
Records for this company are incomplete in the surviving state adjutant general reports.
Company H
Records for this company are incomplete in the surviving state adjutant general reports.
Company I
Records for this company are incomplete in the surviving state adjutant general reports.
Company K
Records for this company are incomplete in the surviving state adjutant general reports.
Sources & Notes
- Official Records of the War of the Rebellion, Series I, relevant volumes and parts covering the Army of the Tennessee and 15th Army Corps.
- State Adjutant General Report for Indiana (years 1862–1865; volumes and page ranges as available).
- Dyer’s Compendium.
- Fox, “Regimental Losses in the American Civil War.”
- The Union Army, Federal Publishing Company, 1908, Volume 3.