军队在敌人的攻击下开始撤退。
jūnduì zài dírén de gōngjī xià kāishǐ chètuì 。
The army began to retreat under the enemy's attack.
我们决定在条件不利时撤退。
wǒmen juédìng zài tiáojiàn bùlì shí chètuì 。
We decided to retreat when the conditions were unfavorable.
他指挥队伍有序撤退。
tā zhǐhuī duìwǔ yǒuxù chètuì 。
He commanded the troops to retreat in an orderly manner.