Marathon-class heavy cruiser

Marathon-class Cruiser The Marathon-class Cruiser is a classification of United Nations Space Command warship.

Description
These starships were the replacement for the aging. These behemoths, ranking in at 1192 meters, are over two times the length of a UNSC Frigate. They are also known for their heavy armor - they can survive multiple plasma torpedo impacts, far greater damage than any UNSC Frigate or UNSC Destroyer can sustain.

Appearances
Due to their diminishing numbers and the onslaught of the genocidal Covenant, further numbers of these great cruisers have been reassigned to the defense of the Inner Colonies. Marathons were present at the Battle of Sigma Octanus IV, the First Battle of Reach. Eight saw action at the First Battle of Earth under Fleet Admiral Harper. Another was part of Battle Group Stalingrad during the Battle of Onyx. Its likely that some would also be engaged at the Second Battle of Earth.

Since these Cruisers weren't seen in Halo 3, it could be assumed that either all Marathon class ships were either destroyed when more Covenant ships arrived or reserved for the attack on Truth's Dreadnaught.

Trivia

 * In Halo: The Fall of Reach, the Marathon classification is erroneously labeled as a carrier.
 * The name Marathon comes from Bungies Pre-Halo Marathon series of games.
 * They bear a resemblance to the older Halcyon-class cruisers.
 * In Halo: The Fall of Reach, it mentions that Leviathan was one of twenty UNSC Cruisers left in the fleet, and were being slowly pulled back to protect the Inner Colonies.