But know that U-571 isn't even close to true event or SOMEWHAT true events but just simply write history in wrong manner.
It is just like I write that the "fathers of the American cavalry/U.S. Cavalry" was some foreigners, not Americans.
Oh, wait that is actually true, sorry bad agsample.
But this is the same to say that WWII was started by germans not nazis (again bad egsample) but was started by Japanese or russians.