This is the 500th most frequent Ukrainian word.
військовим
"Військовим" means "military" or "serviceman" in English.
In this sentence, 'військовим' acts as a predicate in a state context, describing someone's profession.
Він став військовим після школи.
He became military personnel after school.
Here, 'військовим' is used as a noun in the instrumental case to indicate the entity benefiting from an action.
Цим військовим надають медичну допомогу.
These military personnel are receiving medical assistance.
In this instance, 'військовим' functions as an adjective in the plural form and instrumental case, describing the noun 'навчаннях' (exercises).