He can be called back up to serve again whether he is NCS (National Call to Service), Ready Reserves, Select Reserves, active duty or just what most people know as the plain ole reserves. One of mine and DH's good friends has served 3 tours of Iraq/Afaghanistan. 1 he volunteered for and the other 2 he was told to go. It's such a tough situation to be in, and at times the military is very unkind to their servicemembers and the servicemembers families. We're experiencing this ourselves as DH is leaving active duty and going into the reserves. All your FSIL can do is go and serve, and hopefully all this will be over soon. Please tell your DD and FSIL THANK YOU for serving. She serves just as much as he does. As a Navy wife myself, there is nothing harder than watching your DH leave as you stay behind with a young child. It's hard, but I have NEVER felt more proud than when I watched his ship come back into port after being gone 6 months with only 2 phone calls and letters. So please tell them THANK YOU for fighting for me and my family.