DOCUMENT EVERYTHING! I apologize for yelling, but if you are having a problem with your barely high school educated, incompetent, numb nuts, wrap themselves in the American flag when it is convenient, immediate supervisor about your participation in the Guard or Reserves start carrying a steno pad to work. Write EVERYTHING down, formal and informal performance discussions and daily conversations to include date, time, and people present. “Please excuse me, but I just want to make a few notes for myself” make it obvious that you are keeping notes. If an individual has performance issues, your supervisor has the obligation to conduct “performance counseling”, they should advise you of your performance issues and outline what and how you need to improve. You should never have a situation where an end of the year rating identifies performance discrepancies that had never been addressed during the rating cycle. There are far too many fair weather patriots in management, but you can make them squirm. Make sure that you are doing your job; provide them a copy of your Drill schedule and Annual Training dates in a timely fashion.
Google USERRA (Uniformed Services Employment and Re-employment Rights Act), lots of good stuff, know your rights.