一以当十

Explanation: When quite. A person to withstand ten. Described the heroic army. 　　Source: "Let the Warring States policy a" one when 10, 10 and when the 100, 100 when 1 000. "" Records of Xiang Yu the century, "Chu are all one in when 10 soldiers, Chu army calls moving day, without exception, all anxious fear of the military nobility."