Fleet Combatants are the smaller ships that make up the bulk of the fleet, and carry out the bulk of the routine tasks. 

Frigates are a general purpose military medium range vessel used primarily for attacking a specific space born enemy vessel or light space facility. Frigates typically incorporate a small to medium contingent of Marines or other ground/special combat forces, permanently bivouacked aboard the ship. Frigates allow for a rapid combat response with a follow-up boarding party or moderate ground assault when necessary. 

Destroyers are a broad category of varying sized warships, used primarily as attack and patrol vessels along hostile boarders. Destroyers are specifically designed to engage enemy vessels of any configuration and maintain fire to disable or destroy an enemy force. Most destroyers are used in conjunction with other vessels and are capable of engaging other destroyers and capital ships. Destroyers have a number of specialized onboard combat systems, including Command and Control systems, Combat Information Centres, specialized deep space sensors and crew support systems. Destroyers also function as fast response vessels in and near established space lanes, responding to pirate attacks and providing heavy support for Merchant Marine Patrols near member planets. 

View background information about Frigates
L-1 'Raptor' (2152)	L-6 'Defender' (2247)
View background information about Destroyers
D-16 'Swiftwind (2243)	D-13 'Esaz' (2250)

Klingon Intelligence Briefing Index