There is no way to simply quit the Army once you are on active duty. You are contractually, and perhaps morally, obligated to see your commitment through. However, you could be discharged from duty early if you are physically or psychologically unable to perform your Army duties.

You cannot resign your commission until you have completed eight years as a commissioned officer. Even when you have, you need to complete the resignation letter and send it to the appropriate command.

Your service is NOT ‘at will’ as you are contractually (and by oath) committed to serving for the duration of your freely agreed to length of service.

Once that agreed to time is up, you are able to separate and discharge on schedule – unless circumstances require the military to keep you on-board due to mitigating circumstances (e.g. war). But you can forcefully resign from the military, and here are the steps below.