The Rajputs were passionately fond of the glory of martial arts.
Explanation:
An adjective is a describing word that tells us more about a noun. An adjective phrase is a group of words with an adjective that describes the noun. The adjective phrase will be the expanded group of words 'of martial arts'.
An adjective phrase never has a subject or a verb. It only has an adjective that is elaborated. It usually comes before a subject or an object of a sentence. In the given sentence 'martial' is an adjective that describes the noun 'glory'.
