cavalry vs military personnel

cavalry and military personnel both are nouns.

Word	Noun	Adjective	Verb	Adverb
cavalry	Yes	No	No	No
military personnel	Yes	No	No	No

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

Other hypernyms of cavalry include soldiery, troops.

cavalry (noun)	military personnel (noun)
a highly mobile army unit	soldiers collectively
troops trained to fight on horseback	someone who serves in the armed forces; a member of a military force