USS Valiant (NCC-1731)

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The USS Valiant (NCC-1731) was a Constitution-class (mark II subclass) Federation cruiser starship in the 23rd century, entering Starfleet service on reference stardate 2/0010, authorized by the Starfleet appropriation of stardate 4444 to be named as a replacement for the USS Valiant (NCC-1709). The Valiant was refit to Constitution mark III specifications on stardate 2/0312, and again to Enterprise-subclass specifications on stardate 2/1802. (TOS reference: Star Fleet Technical Manual; ST roleplay module: Federation Ship Recognition Manual)

The stardate given would seem to suggest this ship was authorized during the mid-to-late 2260s. The FASA RPG supplement, Federation Ship Recognition Manual, describes this ship as USS Valiant (NCC-1718), possibly an indication that the "NCC-1731" vessel was never built, or that the numbers were changed and the "NCC-1718" ship is one and the same with the SFTM vessel.

Ships named Valiant
Earth	SS Valiant
Federation Starfleet	USS Valiant (NCC-235, Daedalus-class) • USS Valiant (NCC-1223, Ranger-class) • USS Valiant (NCC-1709, Constitution-class) • USS Valiant (NCC-1731, Constitution-class) • USS Valiant (NCC-2252) • USS Valiant (NCC-2018, Excelsior-class) • USS Valiant (NCC-3010, Royal Sovereign-class) • USS Valiant (NCC-20000, Oberth-class) • USS Valiant (NCC-74210, Defiant-class) • USS Valiant (NCC-75418, Defiant-class)

Bonhomme Richard-subclass (Constitution-class mk II class I/class XI cruiser/heavy cruiser starships)
Refit with mk II engines	Kongo • Valiant
Built to mk II specifications	Bismark • Bonhomme Richard • Centurion (fm. Farragut II) • Constellation • Challenger • Eagle • El Dorado • Endeavour • Essex • Excelsior • Hornet • Intrepid • Kent • Merrimac • Monitor • Saratoga • Wasp • Yamato
Authorized for construction	Ari • Defiance • Krieger • Lafayette • Tori

Achernar-subclass (Constitution-class mk III class I/class XI cruiser/heavy cruiser starships)
Refit with mk III engines	Bismark • Bonhomme Richard • Challenger • Constellation • Constitution • Defiant • Eagle • El Dorado • Endeavour • Enterprise • Essex • Excalibur • Exeter • Farragut • Hood • Hornet • Intrepid • Kent • Kongo • Lexington • Potemkin • Republic • Saratoga • Valiant • Yamato • Yorktown
Built to mk III specifications	Akagi • Ark Royal • Caspan • Chikuma • Discovery • Forrestal • Kaga • Kitty Hawk • Langley • Littorio • Marseille • Radetsky • Richelieu • Rivoli • Santissima Trinidad • Sirius • Ticonderoga • Victory
Authorized for construction	Achernar • Ahzdar • Alam'ak • Alferaz • Alfr • Androcus • Annobon • Astrad • Behr'ak • Czar'ak • Ekinus • Elohim • Esabl • Eskiis • Galina • Ghar • Ghondr • Hajj • Hiemdal • Horok • Jassan • Jenshahn • Jupiter • Kars • Kasimar • Kep Salu • Kestral • Ketoi • Maat • Mazda • Mengen • Mirazh • Mondoloy • Mongo • Ndele • Oblik • Oomaru • Paegan • Pari • Pelione • Phardos • Pilar • Procyon • Proxima • Qizan • Qual'at • Quindar • Rigil Kentaurus • Salayna • Samaara • Shaandra • Shahr • Sinuiji • Sol • Tajarhi • Tali • Temir • Thelonii • Tholus • Tulan • Tutakai • Xanthii • Yaan • Za'faran • Zaahm • Zindar

Enterprise-subclass (Constitution-class class XI/class XII cruiser/heavy cruiser starships)
Federation Starfleet (primary universe)	Ships of various specifications	Achernar • Agincourt • Apollo • Boone • Christopher Pike •Enterprise-A • Furious • Huntington • Kelleghan • Kirishima • Lucas • Musashi • Ranger • Rauer • Salazar • Somers • Tigress • Vengeance • NCC-1335
	Refit to mk I specification	Enterprise • Bismark • Yamato • Challenger • Valiant • Essex • Bonhomme Richard • Potemkin • Constellation • Intrepid • Centurion (fm. Farragut II) • Lexington • Yorktown • Wasp • Forrestal • Republic • Akagi • Rivoli
	Built to mk I specification	Excalibur II • Exeter • Defiant • Hood • Valley Forge • Oriskany • Hancock • Minsk • Yorktown
	Refit to mk II specification	Eagle • Santissima Trinidad • Marseille • Victory • Radetsky
	Built to mk II specification	Zuiho • Graf Zeppelin • Soryu • Hiryu • King George V • Prince of Wales • Franklin • Scharnhorst • Gneisenau • Kaga II •Kashima • Freidland • Konigsberg • Clemenceau
	Refit to mk III specification	Kongo • Saratoga • El Dorado • Ticonderoga • Kitty Hawk
	Built to mk III specification	Kearsarge • Bunker Hill • Chikuma • Emperador • Ukrania • Marcello • Fontana • Java
Terran Empire Starfleet (mirror universe)		Constellation • Deceiver • Enterprise • Farragut • Intrepid • Nixon • Relentless