What does "tour of duty" mean?

A period of time spent on a specific assignment, especially on an overseas mission.

What is a synonym for "tour of duty"?

Common synonyms include: anchor watch, bit, day shift, dogwatch, duty tour, enlistment.

noun

noun ·Rare ·Advanced level

Noun

1
A period of time spent on a specific assignment, especially on an overseas mission.
"Almost every Marine in Viet Nam carries a short-timer’s calendar of his tour of duty—the usual 365 days—plus a bonus of 20 days for being a Marine."
2
a period of time spent in military service wordnet

"Almost every Marine in Viet Nam carries a short-timer’s calendar of his tour of duty—the usual 365 days—plus a bonus of 20 days for being a Marine."