gǔ / dài / jūn / duì / cháng / chèn / yè / sè / zhuó / yíng / dǎ / luàn / dí / jūn / de / bù / shǔ

古代军队常趁夜色斫营，打乱敌军的部署。

In ancient times, armies often attacked enemy camps under cover of darkness to disrupt their deployment.