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Grey Wolves: U-Boats 1942 to 1943 (2005)
The scourge of the Atlantic Ocean during World War II, Hitler's U-boat "Wolf Packs" were described by Winston Churchill as his greatest fear. And these roving bands of submarines quickly became the biggest threat to England, cutting the country off from vital supply routes and almost starving it into submission. This documentary traces the key middle years of the U-boat war from 1942-43 with images collected from captured German footage.