So am I to understand that the tank Pitt and his crew were in, was the Firefly ( with the 17 pounder cannon), that the Brits used? or was the American version 76mm available in WW2? I thought that was a development post war and saw first time combat use in Korea...

not much of a Tank Scholar, but via this thread and the movie, I've been reading on Wikipedia a fair amount this week... was going to stop into Barnes and Nobles this weekend and see if I can locate a tech book on them...