Trying to find the history of WWII medals and attached devices.?

I am trying to find sites on the web that describe each medal, what it was issued for and what the attached devices, such as the bronze stars, bronze arrow head and so forth, mean. Is there an order that they should be worn in? My primary focus is on the European theater of operations and specifically the 101st Airborne from Normandy on.

Trying to find the history of WWII medals and attached devices.?violin

This site has medals (you can drill down for their history) and also will list them by correct order.

Trying to find the history of WWII medals and attached devices.?chinese theater opera theater

i think the purple heart is only if you got wounded
The US Army's site, www.army.gov, may be of some help.