- 易其事革其謀使人無識易其居迂其途使人不得慮
of the Hou Han Shu, “Pan Ch‘ao took the field with 25,000 men from Khotan and other Central Asian states with the object of crushing Yarkand. The King of Kutcha replied by dispatching his chief commander to succour the place with an army drawn from the kingdoms of Wên-su, Ku-mo and Wei-t‘ou, totalling 50,000 men. Pan Ch‘ao summoned his officers and also the King of Khotan to a council of war, and said: ‘Our forces are now outnumbered and unable to make head against the enemy. The best plan, then, is for us to separate and disperse, each in a different direction. The King of Khotan will march away by the easterly route, and I will then return myself towards the west. Let us wait until the evening drum has sounded and then start.’ Pan Ch‘ao now secretly released the prisoners whom he had taken alive, and the King of Kutcha was thus informed of his plans. Much elated by the news, the latter set off at once at the head of 10,000 horsemen to bar Pan Ch‘ao’s retreat in the west, while the King of Wên-su rode eastwards with 8000 horse in order to intercept the King of Khotan. As soon as Pan Ch‘ao knew that the two chieftains had gone, he called his divisions together, got them well in hand, and at cock-crow hurled them against the army of Yarkand, as it lay encamped. The barbarians, panic-stricken, fled in confusion, and were closely pursued by Pan Ch‘ao. Over 5000 heads were brought back as trophies, besides immense spoils in the shape of horses and cattle and valuables of every description. Yarkand then capitulating, Kutcha and the other kingdoms drew off their respective forces. From that time forward, Pan Ch‘ao’s prestige completely overawed the countries of the west.” In this case, we see that the Chinese general not only kept his own officers in ignorance of his real plans, but actually took the bold step of dividing his army in order to deceive the enemy.
37. By altering his arrangements and changing his plans,
Wang Hsi thinks that this means, not using the same stratagem twice. He says: 已行之事已施之謀當革易之不可再之.
he keeps the enemy without definite knowledge.
Note that 人 denotes the enemy, as opposed to the 士卒 of § 36. Capt. Calthrop, not perceiving this, joins the two paragraphs into one. Chang Yü quotes 太白山人 as saying: 兵貴詭道者非止詭敵也抑詭我 士卒使由而不使知之也 “The axiom, that war is based on deception, does not apply only to deception of the enemy. You must deceive even your own soldiers. Make them follow you, but without letting them know why.”
