The Illinois Sixteenth Cavalry Regiment was composed principally of Chicago men. Thieleman's and Schambeck's Cavalry companies, raised at the outset of the war, formed the nucleus of the Regiment. Thieleman's Company served as Gen. Sherman's escort for a portion of the war and the 16th accompanied Sherman on the Atlanta Campaign, then pursued Hood into Tennessee for the battles of Nashville and Franklin. The regiment lost during service 3 Officers and 30 Enlisted men killed and mortally wounded and 1 Officer and 228 Enlisted men by disease. Total 262. Companies of the Illinois 16th Cavalry Regiment Company A - Cook County (Also known as Chicago Cavalry, Thielemann's Cavalry Company, Wilson's Dragoons) Company B - Cook County (Also known as Chicago Cavalry, Thielemann's Cavalry Company) Company C - Cook County (Also known as Chicago Dragoons or Rifles, Gibson's Battalion, Hoffman Dragoons, Schambeck's Cavalry Company, Washington Light Cavalry) Company D - Sangamon County and Cook County Company E - St. Louis County, Missouri Company F - St. Clair County Company G - St. Clair County and Cook County Company H - Kane County Company I - Cook County (Also known as McClernand Guard Battalion or Bodyguard) Company K - Alexander County (Also known as McClernand Guard Battalion or Bodyguard) Company L - Cook County and Champaign County - (McClernand Guard Battalion or Bodyguard) Company M - Cook County and Sangamon County