《百战奇略·第四卷·谷战》
诚如兵法所说： 部队在山地行军作战，必须沿着山谷行进，依托谷地设阵。 东汉将领马援出任陇西太守的时候，三降羌以及与其勾结的塞外诸族，他们并作乱为寇，塞外诸族勾结作乱为寇，杀了长吏。
后汉将马援为陇西太守，三绛羌与塞外诸种为寇，杀长吏。
Just as the Art of War says: When an army is fighting in mountainous terrain, it must advance along valleys and set up camp in gorges. When the Eastern Han general Ma Yuan was appointed governor of Longxi, the Qiang people and the foreign tribes who had joined forces with them revolted and killed the local officials.