"You ever see those old-Earth war videos? World War II Russians. Think of them, outfitted in fur and fighting in snow, and you have a pretty good image of the Thanatus homeworld."
The Thanatus are the founders of the Union of Species. Having lived on a world with incredibly hostile conditions that make life even in built-up areas a struggle for survival, all Thanatus citizens are strong and fit for combat. The Collective-Union War from 2031 to 2221