夜行军

例句：

1. 1. The soldiers were ordered to march in the dark, without lights.
   士兵们被命令在黑暗中行军，没有灯光。
2. 2. The military evacuated the area during the night, ensuring safety for everyone.
   军队在夜间撤离该地区，确保每个人的安全。
3. 3. The army conducted a night march to test its troops' endurance.
   军队进行了一次夜间行军，以测试其部队的耐力。