Name: Order of the Trident
Homeworld: Poseidon
Founder's name: Magos Athena Erectheus
History: The Order of the Trident was not founded under the Ministorum's aegis, but under the Adeptus Mechanicus'. It was originally a unit of female Skitarii, raised on the forge world of Poseidon during the Age of Apostasy, given arms and armor similar to the Brides of the Emperor so they may defend the Mechanicus' interests from Goge Vandire's excesses. At the time, the Mechanicus forbid Ministorum Priests setting foot upon its worlds; this law was a source of much conflict between the organizations. After Vandire's fall, Sebastian Thor asked the Mechanicus to repeal this law and restore peace between it and the Ministorum. The Order of the Trident "escorted" Ministorum Priests as they ministered to workers on forge worlds- in truth, to monitor the Priests' actions, restrict their movements, and to censure them if they speak out against the Mechanicus- this initially caused conflicts between the Order of the Trident and the Adepta Sororitas members who served as the Priests' honor guards, but the Sisters reconciled when a Ministorum Priest uncovered a Heretek cell on Poseidon. Eventually, the Ministorum and Mechanicus Orders' beliefs began merging, and the Order of the Trident began to undertake duties traditionally assigned to the Adepta Sororitas, such as providing charity to the poor.
Beliefs: The Sisters venerate the Emperor in his guise as the Omnissiah, the "Machine God" the Adeptus Mechanicus worships. They wear the Mechanicus' cogwheel emblem in place of the Aquila. As a Skitarii unit, they do not answer to the Ecclesiarch's authority, but to the Fabricator-General's.
Notable Sisters: Amphitrite Halosydne, a Centurion during the Battle for Poseidon (note the Skitarii rank), to whom the Steel Confessors gifted a shock claymore in honor of her valor. Caenis Atrax, a Praetorian during the Second War for Armageddon, named a Living Saint for holding up a tank manufactorum's roof (which was structurally weakened due to an Ork artillery attack) so the workers may finish assembling their vehicles and then drive to safety in the completed tanks; she let go when the Orks entered the manufactorum to loot it, killing approximately 96-100 of the xenos; her augmetic enhancements allowing her to survive the structure's collapse, and she was martyred in the act of impaling an Ork Nob upon the broken barrel of her arm-mounted autocannon.
Notable allies: Iron Hands, Steel Confessors/Steel Crusaders, Skitarii
Significant battles joined: Battle for Poseidon (10th Black Crusade). Second and Third Wars for Armageddon
Specialty: Armored assault, air and artillery support