The Protector General (都护 dūhù) was a military governor responsible for frontier regions. During the Three Kingdoms, this title was used for commanders defending strategic border areas against nomadic incursions, particularly in the northwest (Liang Province) and southwest (Nanzhong).
References
- Chen Shou, Records of the Three Kingdoms (三国志)
- Fan Ye, Book of the Later Han (后汉书)