The '''Iron Halo''' is part of the [[Space Marine Armoury]]. It is an ancient artifact, a special [[Space Marine Honour Badge|Honour Badge]] given to a [[Space Marine]] who has shown exceptional initiative or bravery on the battlefield. It incorporates a powerful [[conversion field]], similar to the [[Rosarius]] or [[Refractor Field]] , that reinforces the resiliency of [[Power Armour]], allowing them to weather even the most fierce attacks.{{Fn|2}}