The story draws inspiration from real historical battles, which pitted Chinese forces against the Islamic Abbasid Caliphate and Tibetan Empire in Central Asia.The story draws inspiration from real historical battles, which pitted Chinese forces against the Islamic Abbasid Caliphate and Tibetan Empire in Central Asia.The story draws inspiration from real historical battles, which pitted Chinese forces against the Islamic Abbasid Caliphate and Tibetan Empire in Central Asia.