Showalter's (Daniel) Cavalry. See Texas Troops, Confederate, 4th Regiment, Arizona Brigade.

Shuman's (Jacob S.) Cavalry. See Ohio Troops, 11th Regiment.

Simmons' (Abram W.) Heavy Artillery. See Indiana Troops, 1st Regiment, Battery A.

Simonton's (Morgan) Artillery. See Missouri Troops, Union, 2nd Regiment, Battery H.

Simpson's (Smith H.0 Infantry. See New Mexico Troops, 1st Regiment.

Sink's (Stephen) Infantry. See Missouri Troops, Union, 72nd Regiment, Enrolled Militia.

Slaughter's (Robert F.) Cavalry. See Minnesota Troops, 2nd Regiment.

Slayback's (Alonzo W.) Cavalry. See Missouri Troops, Confederate.

Slemons' (W. F.) Cavalry. See Arkansas Troops, Confederate, 2nd Regiment.

Sloane's Infantry. (Official designation not of record.) See Captain Sloane.

Slocum's (John D.) Infantry. See California Troops, 1st Regiment.

Smart's (Edwin) Infantry. See Missouri Troops, Union, 49th Regiment.

Smith's (Ashbel) Infantry. See Texas Troops, Confederate, 2nd Regiment.

Smith's (Charles A.) Infantry. See California Troops, 5th Regiment.

Smith's (Charles A.) Infantry. See Wisconsin Troops, 35th Regiment.

Smith's (Charles O.) Cavalry. See Kansas Troops, 15th Regiment.

Smith's (C. P.) Cavalry. See Texas Troops, Confederate, 25th Regiment.

Smith's (Emil) Heavy Artillery. See Union Troops, Colored, 3rd Regiment.

Smith's (George I.) Infantry. See Missouri Troops, Union, 49th Regiment.

Smith's (Harry S.) Infantry. See Illinois Troops, 91st Regiment.

Smith's (Louis B.) Artillery. See Union Troops, Colored, 2nd Regiment, Battery I.

Smith's (Lyman B.) Artillery. See Union Troops, Colored, 2nd Regiment, Battery I.

Smith's (Lyman B.) Cavalry. See Minnesota Troops, 2nd Regiment.

Smith's (Moses W.) Cavalry. See Missouri Troops, Confederate, 11th Regiment.

Smith's (Thomas M.) Cavalry. See Minnesota Troops, 2nd Regiment.

Smith's (William J. A.) Infantry. See Missouri Troops, Union, 85th Regiment, Enrolled Militia.

Smizer's (John W.) Infantry. See Missouri Troops, Confederate, 8th Regiment (Mitchell's).

Snoddy's (James D.) Infantry. See Kansas Troops, 6th Regiment, Militia.

Snoddy's (Lewellyn O.) Infantry. See Union Troops, Colored, 18th Regiment.

Snyder's (Abraham N.) Infantry. See Iowa Troops, 35th Regiment.

Snyder's (Napoleon) Cavalry. See Mississippi Troops, Union, 1st Regiment.

Soule's (Silas S.) Cavalry. See. Colorado Troops, 1st Regiment.

Southworth's (Irving D.) Artillery. See New York Troops, 25th Battery.

Spaight's (Ashley W.) Infantry. See Texas Troops, Confederate, 21st Regiment; also 11th Battalion.

Spanish Guards, Infantry. See Alabama Troops, Confederate, 21st Regiment.

Speed's (Charles) Infantry. See Union Troops, Regulars, 5th Regiment.

Springer's (David K.) Infantry. See Union Troops, Veteran Reserve Corps, 2nd Battalion, 169th Company.

Spurling's (Andrew B.) Cavalry. See Maine Troops, 2nd Regiment.

Staddon's (Samuel) Infantry. See California Troops, 5th Regiment.

Stafford's (Edward) Infantry. See Missouri Troops, Union, 2nd Regiment, Enrolled Militia.

Stafford's (W. M.) Artillery. See Texas Troops, Confederate.

Standifer's (Thomas C.) Infantry. See Louisiana Troops, Confederate, 12th Regiment.

Stanley's (Joseph) Infantry. See Missouri Troops, Union, 35th Regiment, Provisional Enrolled Militia.

Starks' (Denton D.) Artillery. See Arkansas Troops, Union, 1st Battery.

Stark's (Henry) Heavy Artillery. See Michigan Troops, 1st Regiment.

Starr's (Henry A.) Infantry. See Wisconsin Troops, 20th Regiment.

Steels' (James) Infantry. See Indiana Troops, 16th Regiment.

Steele's (James M.) Infantry. See Union Troops, Colored, 11th Regiment.

Steffens' (John) Artillery. See Missouri Troops, Union, 1st Regiment, Battery L.