Where did my grandfather fight during WWII?

I know that he was in the Army.  He was  a Technician Fifth Grade 38 215 662 for the Battery A 400th Anti-Aircraft Artillery Automatic Weapons Battalion.  His Enlisted Record and Report of Separation - Honorable Discharge shows that he served in the Siciian; Rome-Arno; Naples-Foggia; Rhineland GO 33 WD 45.  He received a EAME Campaign  Medal with 4 Bronze Stars and I Bronze Arrowhead; Good conduct medal; Victory Ribbon; 4 Overseas Service Bars.

I want to know more detail about the battles he was involved in, etc.