Company 7 iller Bet. Inf ??????

Hello,

For years we did not know much concerning my father-in-laws years in the service during WW II.His name was Edward McGuire, enlisted 8 Jun 1942.We happen to find his military ID card.I don't understand what this means Company 7iller Bet. Inf.?He was a Pvt.We also found a photo of a Company of men, on the back of the photo there is a stamp that saysCorso ?avourN 15
Novara
What I would eventually like do is have an outline of where he served through the course of his enlistment.

Thank-you for any help.

Sincerely,
Linda W. McGuire