Tank

A tank is an armored fighting vehicle designed for either front-line combat, such as as main battle tank (MBT), or for combat support, which combines operational mobility and tactical offensive and defensive capabilities.

Main battle tanks

 * M808 Scorpion Main Battle Tank - The UNSC Defense Force's main battle tank.
 * M808B Scorpion - A common model of the M808 MBT equipped with a coaxial M247T Medium Machine Gun in lieu of the M808's pintle-mounted version.
 * M808B2 Sun Devil: A variant of the M808B armed with four 40mm autocannons.
 * M808B3 Tarantula: A variant of the M808B armed with twin Scimitar 4x178mm rocket pods.
 * M850 Grizzly Main Battle Tank - A less common, more heavily armed and armored main battle tank.

Support tanks

 * SP42 Cobra Main Battle Tank - A light, wheeled railgun-armed vehicle used for anti-armor/anti-fortification support, despite its designation as a main battle tank.
 * M9 Wolverine Main Anti-Aircraft Tank - Primary UNSCDF anti-aircraft support vehicle; designated as a tank due to chassis design, not combat role.
 * M145D Mobile Artillery Assault Platform - A prototype platform armed with the Zeus 320mm plasma cannon, reverse engineered from Covenant technology.

Covenant

 * Type-26 Wraith Assault Gun Carriage - The Covenant's primary battle tank and mobile artillery platform.
 * Type-52 Anti-Aircraft Artillery - An anti-air variant from the Wraith armed with several Class-2 fuel rod cannons instead of the standard plasma mortar.

Other uses of the term

 * Flood tank form - A Flood pure form derived from a mutating stalker form.
 * Methane tank - A methane container used by the Unggoy to breathe in non-methane rich environments.