Rufraunova

Rufraunova is a vitally important Imperial fortress world located in the Victoria Sub-Sector, which is a part of the much larger Geirland Sector of the Segmentum Ultima. It is also the regimental homeworld of the 203rd Combined Siege Regiment of the Astra Militarum. Located adjacent to the Chapter Homeworld of Tharkand, home of the Lyran Guard Space Marine Chapter, these two forces have often served alongside one another during several joint-Imperial campaigns.

Background
The 203rd Combined, being a regiment consisting of many soldiers from various worlds, no longer has one singular homeworld in the traditional sense and instead has its official main base of operations located on the fortress world of Rufraunova. Located in the Victoria Sub-Sector of Segmentum Ultima, Rufraunova is located within a cluster of armory worlds and forge worlds, making it a relatively important nexus for moving men and materiale through the Imperium. The planet is part of the Geirland Sector and is within relative close proximity to the Lyran Guard Space Marine Chapter Homeworld of Tharkad, as a result the 203rd and the Lyran Guard have often operated together on a number of campaigns.

Historically, the 203rd Combined has hundred of soldiers that can trace their origins both back to their original regiments and their corresponding homeworlds. The original homes of the regiment are Valhalla, Krieg, Armageddon, and the now destroyed Cadia. Many of the veteran soldiers that were consolidated into the 203rd following the Taiga Worlds Campaign maintain a number of mementos to remind them of their place of origin.