The 'text' field can have anything entered that you want shown. 'Branch' probably should be the branch of service they were in, but there are no 'units' parameter on this sticker, so I would add anything in the 'text' field that you want to be seen in the sticker. When you have it entered, make sure to select the Preview so you can see what it will look like before you save it. The name will be shown at the beginning when it is saved.
I would add as much info into the biography, also