Is you don't know what to write about how they serve are country try to put a question in their somewhere. Talk about how if it wasn't for men and woman like them their country would not have freedom. Tell him or her that without them their would be no country to fight for.
Dear Service Member, THANK YOU for everything you have sacrificed to serve our country. I do not take my freedom for granted and I'm grateful every day there are people like you who put their lives on the line. I don't know you personally, but I feel the sacrifice you and your family offer up every day