guard duty
Noun
Meaning
the duty of serving as a sentry
Source: WordNetSynonyms
Hypernyms
Examples
he was on guard that night
Act II Private Willis, on night guard duty, paces outside the Palace of Westminster and muses on political life ("When all night long a chap remains").
Corporal Gborie quickly went to the SLBS FM 99.9 headquarters in Freetown to announce the coup to a shock nation and to alert all soldiers across the country to report for guard duty.
Hagen, left on guard duty, gloats that his so-called masters are unwittingly bringing the ring to him (Monologue: Hagen's watch).
Feigning illness, Toad bamboozles the Water Rat (who is on guard duty at the time) and escapes.
José is placed on guard duty.