This web page has some info that might be helpful: http://www2.powercom.net/~rokats/wwii.htmlhttp://www2.powercom.net/~rokats/wwii.html If you can't find them there, you might try describing the insignia here. Some of us might be able to identify them. As for the "color along the edge of the cap" I am thinking you are referring to piping on a garrison cap? (A garrison cap is the one that looks like an envelope.) If that is the case, the color signifies which service he was in e.g. light blue = infantry, red = artillery, yellow = cavalry, etc.