MassEffectRP

I'm with Nozz.  It seems like quite a jump from ME 1 to ME 2 of a minority being hostile when ME 1 tells us Geth were sending ships of husks back.  But That's not for here.

I'm seeing a possibility for colonial conflict 15-20 years post war, just as a possible spreading the species out in case of a future conflict.  Plus there already is at least one planet with a co-habitation between Bats and Humans where there was conflict before the war. 

A garden world with heavy populations of humans and batarians, Anhur was home to one of the ugliest violations of sapient rights in modern human history. A consortium of corporations and corrupt politicians, fearing batarian economic competition due to their custom of legal slavery, passed a resolution that abolished the minimum wage - effectively relegalizing slavery on a human-dominated world.
Opponents of the motion quickly turned to activism and violence. A civil war erupted as one side sought to end slavery throughout the system and the other, primarily a batarian faction called the Na'hesit, sought to keep the slaves they had. The Anhur Rebellions raged from 2176 to 2178. The Na'hesit had a significant advantage in ships, labor, and weapons, forcing the Anhur militias to hire mercenary companies to even the odds. In the end the abolitionists won out, though at the cost of much of their infrastructure. Though Anhur today still has significant natural wealth, it is economically depressed save for the reconstruction industry.