Board Thread:Warhammer 40k General Discussion/@comment-203.134.114.240-20130721023526/@comment-8881468-20130723120540

the Jokaero are taken because of their skill as somethinghighly sought after by the IoM.

nevertheless, find Xenos that live together with humans, both will be fought against, find humans that don't wanna bow down to the Imperium, they will be fought against, find xenos that sit on ressources sought after by the Imperium, they will be fought against(imagine a 2nd Nostramo (Adamantium) as Xenos planet and IoM comes along...), find xenos that defend their homeworlds against a militaristic, xenophobic entity like the IoM, you will have war.