However, Space Marines also have a history of looking down their noses even at other military forces within the Imperium, regarding Imperial Guard and Ministorum forces as 'only human'. Space Marines: Space Marines hold the 'typical' Imperial view of other races: They are untrustworthy Heretics who should only be regarded as subjects for conquest. Quoting from ' Using Allies in Warhammer 40,000' here is a view of space marine allies in previous editions: ( of the 3rd edition rule book) Space Marine Chapter allies backstory:
From what I can tell you could just add any unit you wanted to your force.Ĭome third edition, these rules had gone and been replaced with a system for using multiple force organization charts to field multiple armies. Previously in second edition there were rules in each codex for who could ally with who, specifically mentioning which armies you were allowed to team up with. TL DR Yes they can, however the rules for alliances vary by edition
