Punic-class supercarrier
From Halopedia, the Halo wiki
The UNSC Supercarrier is a heavy warship classification within the UNSC fleets. There were only a few constructed, one of these was the UNSC Trafalgar, which fell at the Battle of Reach. This warship classification was the most powerful ever built, more so than the than the UNSC carrier class and the UNSC Marathon-class Cruiser in terms of overall power. Aswells as carrying the most troops, longswords, shortsword, pelicans, albatross, Scorpion Tanks, warthogs etc..