I haven't done one of these, did ask my gson to save me his military uniforms for me to make a quilt for him.
However, there are some folks on here that have and you may be able to find info by googling quilts of valor or quilts from uniforms. I know there are instructions out there because a while back I was looking for instructions.
Good luck and bet he will love the quilt, however you do it.
delma