KILLERS AND THE KILL: Victory in the Atlantic, 1943-1945 - S1.E16

The U-Boats are ascendant, and their triumphs trumpeted over Germany. But the Allies hit back with new bases in lands bordering the Atlantic Ocean, new antisubmarine techniques, and the new escort, or "jeep", carrier. Thus, the neutralization and destruction of the German U-Boat forces is guaranteed.