An agent from the Army Criminal Investigation Division (CID), NCIS, OSI, or CGIS just knocked on your door or called your unit. They said they want to ask you some questions. They said it was routine. They said you are not under arrest.
What they did not tell you is that anything you say — right now, before an attorney is present — can and will be used to build a case against you. The investigation has already begun. The question is whether your defense begins now, or after you have already made statements that cannot be taken back.
YOUR MOST IMPORTANT RIGHT — ARTICLE 31(b) UCMJ
Under Article 31(b) of the UCMJ, no one subject to military law may interrogate or request a statement from a person suspected of an offense without first advising that person of their right to remain silent and that any statement may be used against them. This right is broader than Miranda — it applies any time a military questioner suspects you of an offense, even in informal settings. Exercise it immediately.
The full text of Article 31 rights is codified at 10 U.S.C. § 831. Understanding and invoking these rights at the moment of first contact is one of the most important things a service member can do.