- SCHOEPF, Albin Francisco
- SMITH, Preston CSA
- Swing Team
- Stevens,Atherton,H. jr.
- Saber Knot
- Schabraque
- Sherman Neck Ties
- Sinker
- Stone
- Spring Hill, Battle of
- Sink
- Sally-port
- Sixes and Sevens
- South Mountain, Battle of
- Salt beef
- Starr revolver
- Stonewall Jackson (mascot)
- Sallie (mascot)
- Susan Jane (mascot)
- Sergeant (mascot)
- Sawbuck (mascot)
- Stock (Artillery)
- Sponge-Rammer
- Sponge
- Spherical Case
- Smoothbore
- Shot
- Shell
- Section
- Sabot
- Strangery
- Sprue
- Spina Bifida
- Spanish Influenza
- Sore Throat Distemper
- Sharpsburg
- Seven Pines, Battle of
- Snodgrass Hill
- Saviour of the Valley
- Salem Church, Battle of
- Snyder's Bluff, Battle of
- Stannard, George
- Sovereign
- Swamp Rats
- Sanitary Commission
- Swamp Angel
- Sutler
- Striker
- Stone fleet
- Stay at home ranger
- Stars and Bars
- Standard
- Springfield rifle
- Sporting house
- Stainless Banner
- Spencer rifle
- Spar torpedo
- St. Andrews Cross
- Southern Cross
- Somebody's Darlin'
- Soda pop gun
- Slouch hat
- Skillygalee
- Skedaddle
- Sibley tent
- Shucks
- Silent battle
- Shoat brands/bars
- Shinplaster
- Sherman's bummers
- Shebang
- Sharpshooter
- Sharps rifle
- See the elephant, to
- Secret Line
- Secesh
- Scout
- Scouse
- Scalawag
- Sawbones
- Savage revolver
- Sardine box
- Salt horse
- Sack coat
- Sherman's Bowties
- Shrapnel
- Stockade
- Skirmishers
- Skirmish
- Skirmish line
- Sortie
- Screen (cavalry)
- Strategic turning
- Strategy
- Spike
- Sap roller
- Sapper
- Salient
- Stand of Colors
- Stand Of Arms
- Shiloh
- Shoddy