There is more information available on this subject at Capital ship on the English Wikipedia.

Capital ships are the most important and largest warships; the ones with the heaviest firepower and armor. There is usually no formal criterion for the classification, other than the fact that these ships tend to be heavily armed and armored. Despite the vagueness of this category, however, it is still a useful concept when thinking about strategy, for instance to compare relative naval strengths in a theater of operations without having to get bogged down in the exact details of tonnage and gun variants. A capital ship is generally a leading or primary ship in a fleet, battlegroup, or Strike Force.

ForerunnerEdit

Main article: Forerunner

• Key-class dreadnought
• Unidentified dreadnought class
• Fortress-class warship

CovenantEdit

Main article: Covenant Empire

These are the classifications of Covenant warships known to fall under the Capital Ship category:

• CSO-class supercarrier
• CAS-class assault carrier
• CCS-class battlecruiser
• Covenant supercruiser
• Covenant battleship
• Reverence-class cruiser

UNSCEdit

Main article: United Nations Space Command

These are the classifications of UNSC warships known to fall under the Capital Ship category:

• Halcyon-class light cruiser
• Marathon-class cruiser
• Valiant-class supercruiser
• UNSC carrier
• UNSC supercarrier
• Infinity-class warship