I know how they usually work guard duty in the military.

Put only men who are not going with us on guard duty.

A few weeks later he was again on guard duty.

He was still on guard duty, though that wasn't his chief reason for being here.

I got a gun and took over guard duty while the other men went back to bed.

The man set out on guard duty the night before was missing.

"Why not just post them on guard duty for two days?"

We make them earn their keep by doing guard duty.

And naturally some would be on guard duty over you.

But if there's just animals, why's the major got us out on guard duty?

I won't be able to spare engineers for sentry duty once we begin.

Standing on sentry duty, the big African looked like a loyal guard.

He was making ready for his turn at sentry duty.

"I want all the men within whistle sound that aren't on sentry duty."

"They immediately start doing sentry duty and caring for the young."

The others were put to work on sentry duty or cleaning up.

"We must return to the camp to begin sentry duty."

Yet there had been only one man on sentry duty.

After the second time she tried to sneak out, I sent her to bed and took up sentry duty here by the door.

He would never have to do patrols or sentry duties.