自卫队 (zìwèiduì) is a noun meaning "Self-Defense Forces." It most commonly refers to the Japan Self-Defense Forces (日本自卫队), the military forces of Japan. The term literally combines 自卫 (self-defense) and 队 (team or force).
日本自卫队在地震后参与了救灾工作。
rìběn zìwèiduì zài dìzhèn hòu cānyù le jiùzāi gōngzuò.
The Japan Self-Defense Forces participated in disaster relief efforts after the earthquake.
自卫队派出了直升机前往灾区运送物资。
zìwèiduì pàichū le zhíshēngjī qiánwǎng zāiqū yùnsòng wùzī.
The Self-Defense Forces dispatched helicopters to the disaster area to deliver supplies.
他的哥哥是自卫队的一名军官。
tā de gēge shì zìwèiduì de yī míng jūnguān.
His older brother is an officer in the Self-Defense Forces.