I served, my children served (one still is) and someone in my family has served in every American armed conflict since we for with (NOT "for") the British against the French & Indians.
I don't expect to be thanked for my service. I am, in fact slightly uncomfortable when someone does. As I look at it, serving is just something a good citizen does.
I do thank those who have taken wounds and suffered injury as a result of their service. I don't thank them for their service, I thank them for their sacrifice.