Short Answer
You will most likely be separated.
Discussion
However there is an exception that allows first time offenders below the rank of E-5 to remain in service. This is rarely used in today’ force but something you need to read about to be well armed with the facts and courses of action you may have.
References
See Ar 600-85 and AR 635-200. There may also be local National Guard supplements to these regulations in your state.