Tactical Dreadnought Armour, or Terminator Armour as it is more usually known, is the most resilient form of personal protection available to the Adeptus Astartes. Originally developed during the closing years of the Great Crusade, and adapted from the heaviest of industrial gear, several types and patterns were developed concurrently.

Of these, the Indomitus pattern is perhaps the most widespread, due to its template being held on key Forge Worlds such as Mars, although Tartaros Pattern Terminator armour is also issued to the Veterans of a Chapter’s 1st Company. Perhaps the most advanced form of Tactical Dreadnought Armour, the Tartaros pattern shares many systems with the MkIV ‘Maximus’ pattern of power armour, and provides greater mobility for its wearer than the Indomitus pattern with no loss in durability or protection.