By the end of the war, more than 3,000 merchant ships had been sunk, as well as almost 800 U-Boats.
In the end, the Battle of the Atlantic was eventually won by technology. Radar to detect U-Boats from the surface, radio interception, and code-breaking all played a part. By the end of the war, more than 3,000 merchant ships had been sunk, as well as almost 800 U-Boats.