The Huns
The Huns were a pretty sketchy bunch. They were known to slash the cheeks of new born boys in order to teach them to deal with pain right from the get go. This also left marks on them, differentiating them from everyone else. The Huns liked to fight on horseback, and like the Normans, they had it down to a science. They were a dominating force that swept across Europe to the sound of yells and galloping. The way they rode their horses also allowed them to have greater mobility than most of their enemies. They also had invented the Hunnic Bow, which was far more advanced than anything else as far as long distance weapons go.