Company "A" 338th Infantry, Italy, WWII

I'm looking for any information on my uncle Robert Thomas LEWIS from up-state New York who was killed May 12, 1944 in Italy.I don't know his Division but he was buried in the U.S. Military cemetery, Carano which I believe is not far from Naples.Probably not many people who would remember him but the family would like to find out what happened that day.Any help at all would be appreciated.Thanks.Joe McDonough