fatigues vs military uniform

fatigues and military uniform both are nouns.

Word	Noun	Adjective	Verb	Adverb
fatigues	Yes	No	No	No
military uniform	Yes	No	No	No

As nouns, military uniform is a hypernym of fatigues; that is, military uniform is a word with a broader meaning than fatigues:

fatigues: military uniform worn by military personnel when doing menial labor
military uniform: prescribed identifying uniform for soldiers

fatigues (noun)	military uniform (noun)
military uniform worn by military personnel when doing menial labor	prescribed identifying uniform for soldiers