fatigue duty is a noun meaning "labor of a nonmilitary kind done by soldiers (cleaning or digging or draining or so on)". It carries one recorded sense.
labor of a nonmilitary kind done by soldiers (cleaning or digging or draining or so on)
“the soldiers were put on fatigue to teach them a lesson”
“they were assigned to kitchen fatigues”
military
Definitions, synonyms and semantic relations for fatigue duty come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.