/ˈæbsəns wɪðaʊt ˈɒfɪʃəl liːv/ – Pharse
Definition: (quân sự) đào ngũ
A more thorough explanation: refers to the act of being absent from one’s place of employment or duty without obtaining prior authorization. It is often considered a disciplinary offense.
Example: The soldier are being considered to be absent without official leave.