Massachusetts 21st Volunteer Infantry (Union)
Massachusetts, United States of America
Companies
Massachusetts 21st Volunteer Infantry, Company A (Union)
Massachusetts 21st Volunteer Infantry, Company B (Union)
Massachusetts 21st Volunteer Infantry, Company C (Union)
Massachusetts 21st Volunteer Infantry, Company D (Union)
Massachusetts 21st Volunteer Infantry, Company E (Union)
Massachusetts 21st Volunteer Infantry, Company F (Union)
Massachusetts 21st Volunteer Infantry, Company F&S (Union)
Massachusetts 21st Volunteer Infantry, Company G (Union)
Massachusetts 21st Volunteer Infantry, Company H (Union)
Massachusetts 21st Volunteer Infantry, Company I (Union)
Massachusetts 21st Volunteer Infantry, Company K (Union)
Field Officers
Brigadier General Jesse L. Reno
Brigadier General Thomas G. Stevenson
Colonel William S. Clark
Lieutenant Colonel George P. Hawkes
Lieutenant Colonel William S. Clark