He has applied to join the army.

他已报名参军。

《牛津词典》

The son left to join the army.

儿子去参军了。

youdao

Charlie raised his right hand and repeated the oath loudly, "I volunteer to join the army and make all my efforts to protect the people and the country."

查理举起右手，大声重复宣誓：“我自愿加入军队，为保护人民和国家做出一切努力”。

youdao

Images of Uncle Sam were also used on signs during World Wars One and Two to persuade Americans to join the Army.

VOA: special.2009.09.25

The 1960s was really not a troop-friendly kind of place, and this young man went to join the Army and he went to war.

VOA: standard.2010.05.31

"I'm very excited to join the army and serve my country here in Israel,".

VOA: standard.2009.08.05

He said Drummer Rigby's dream had been to join the army when he was growing up.

BBC: Drummer Lee Rigby: Family's 'hearts ripped apart'

"I always wanted to join the Army right from I was a boy, " he said.

BBC: Ballymena soldier Phillip Gillespie back to fitness

Anyone arrested or imprisoned, or who seeks to join the army or police, is scanned.

ECONOMIST: Biometric data and the Afghan war