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The '''Whirlwind Artillery Tank''' is an [[Rhino]]-based artillery support vehicle. The Whirlwind along with the [[Land Raider Helios]] are the closest thing weapons [[Space Marine]] [[Chapter]]s use that would could be considered 'true artillery'. They are based on It is primarily used to soften up a heavily-fortified or well-defended target prior to the [[Rhino]] design, as are most Marine tanksmain attack. It mounts a [[Whirlwind multiple missile launcher]] on its turret, firing either tactical warheads or rapidly deploying minefields with the special 'Castellan' missiles. The Whirlwind design is not available to [[Chaos Space Marines]], since the [[STC]] technology from which is was derived was discovered after the [[Horus Heresy]].¹