Steel Sentinels

''They think themselves strong, but we are beyond strength. ''– Chapter Master Mahar, of the Steel Sentinels

The Steel Sentinels are a Space Marine Chapter of unknown gene seed stock, though their tactics lend themselves to siege warfare, drawing much of their combat doctrines and strategies from the writings of Rogal Dorn and Rouboute Guilliman. They are a fleet based chapter operating primarily on the borders of Segmentum Ultima.

Founding
The Steel Sentinels claim to have been founded by a decree by the High Lords to watch over the Wreath Sub-Sector, a region plagued by regular Ork invasions, renegade activity and xenos plots. Historically the region has been defended by the local Astra Militarum and Segmentum Fleets assigned to the area, occasional intervention by the Steel Sentinels has been documented throughout the millennia.

Dispersal
According to Chapter records, the Steel Sentinels' fleet was split up soon after it reached full strength, reinforcing a number of key strategic points, raiding renegade worlds, destroying defences, liberating the enslaved populations then departing once the Astra Militarum arrive to occupy the planet. Some fleets struck out at xenos held space, spending long periods away from Imperial borders and supplies, when they return, these Astartes are reputed to be quite terse and short tempered when dealing with humans, preferring to commune with the tech priests of the Adeptus Mechanicus when requesting repairs.

Working in relative isolation from one another, the individual Steel Sentinels vessels have developed unique relationships with the sub-sector's population, with some captains earning a reputation as heroes, while others are seen as taskmasters.

Recent Activities
The Steel Sentinels have recently begun consolidating their forces together into one large fleet, the scattered vessels uniting once more under the directive of Chapter Master Mahar.