Calderis

Calderis is a Korianis feudal desert world in Subsector Aurelia and a recruiting ground of the Blood Ravens Chapter. Its inhabitants live in competing tribes, which contend with the heat of the desert, with feral Orks, and with one another.

The First Aurelian Crusade began on Calderis. Davian Thule, leading a small number of battle-brothers, confronted an Ork surge that the Eldar had incited. Tyranids then arrived on the world and poisoned Thule. The same events connect to Gabriel Angelos’s command of the Chapter and to the Force Commander’s first engagements, in which Sergeant Tarkus and Avitus take part.

Calderis has an industrial-revolution level of technology and pays a Solutio Prima tithe, but it is not the capital of Subsector Aurelia. That function passed to Meridian after Aurelia vanished. The world is therefore reckoned alongside Meridian, Typhon Primaris, and Aurelia as one of the settings of the subsector, and it stands chiefly as the place where the First Aurelian Crusade opened.