two men stood sentry on the door every evening
There wasn't a single sentry , and the armies stood like an immense black sea about the castle.
Rustling grass told him that a sentry was standing not five meters away.
on sentry duty
Yet, there appeared to be a crowd forming around the sentry on guard there.
After only a few steps she saw a sentry , standing not too far away, with his back to her.
First, a sentry need no longer be a soldier standing at the entrance to a camp with a pike, or a rifle.
We put one man on top of the Antelope House to act as a sentry as the others patrolled the grounds the next night.
A lone sentry now stands guard, posted by the Northern Alliance.
There should have been a sentry , a guard, or even a sign of some enclave or camp.