Editing Imperial Worlds (section)

===[[Indrick Boreale| SPESS MAHREEN]] Worlds===
These are planets claimed by a [[Space Marine]] chapter. While typically most Chapters select Death Worlds, Feral Worlds, or Feudal Worlds as a home due to the hardiness of their residents, some of these planets are more civilized or even at a [[Ultramarines|better standard of living]] than most of the Imperium - the Realm of [[Ultramar]] is an obvious example of the latter.

Tithe Astartes planets are notable for being one of only two planet types [[Gene-seed|exempt from the usual Imperial Tithe]], with the only other type being ''Aptus Non'' (read: planets which have been [[Exterminatus]]'d or an unimportant place that is considered Imperial territory but has no tactical or strategic value). This does lead to a few political complications. For instance, Space Marines can technically claim a Hive World for recruiting, and some do, but because the tithe of the world is then denied for the recruiting of guardsmen it creates tension between the chapter and the Adeptus Munitorium.