noun
Refers to the armed forces, military affairs, or a military style. Often used attributively in compounds like ミリタリールック (military look).
彼はミリタリーに詳しい。
He is knowledgeable about the military.
このジャケットはミリタリーデザインだ。
This jacket has a military design.
軍隊 is the native Japanese term for 'military' or 'armed forces', while ミリタリー is a loanword often used in fashion, hobbies, or a broader cultural context.
Borrowed from English 'military'.