Since the start of its history, China was in a constant state of war with the neighboring nomadic peoples and no enemy was as fierce as the Xiongnu. In this animated historical documentary, we will describe the Han-Xiongnu war and the battle of Mobei of 119 BC and how this battle influenced the fates of China and the Three Kingdoms period, and the Roman empire when it was attacked by (arguably) the remnants of the Xiongnu the Huns.