I wonder if there is a colonization (or some kinda of conquest) manga/anime like the colonization of the New world, the colonizers "discover" it, after that they become "friends" with the locals, which they betray and slaughter, poison enslave and so on. The locals answer the same way but they are too weak and lose, this is the main thing, the colonizers must win because they are more technologically advanced and don't hesitate to kill men, women and children indiscriminately or sell them in slavery. I don't like stupid plots like in Avatar for instance, keep it more realistic. Well this is the general idea: the stronger ones win because they are more stronger and cruel, smarter and have better weapons etc., the other side are are people that want peace (but are capable of slaughter, treacherousness and cruelty as well) in the beginning but are fooled and almost completely annihilated because they have primitive weapons or just doesn't have the immunity to a certain diseases, just like in the real history right. No yuri/yaoi, shounen ai/shoujo ai and hentai.
Thank you.