Terra Formars OVA
Once upon a time, mankind had a dream. A dream of conquering a dark and inhospitable country, and making it more like our own. But despite all our efforts, one thing stood in our way; repellent giant savages, more like vermin than true man, simply would not stand by and let their betters conquer their pathetic homeland for some unfathomable reason. So you see, we really had no choice but to try and kill them all. It was the moral thing to do; you might even call it the final solution.
#ANIME