How did the allies defend against you boats?

The Allies employed various strategies to defend against U-boats during World War II, including the use of convoy systems to protect merchant ships by grouping them together and providing naval escorts. They enhanced anti-submarine warfare tactics through improved depth charges, sonar technology, and aerial reconnaissance. Additionally, the Allies developed long-range bombers to patrol ocean areas and target U-boats, while also utilizing intelligence from decrypted communications to anticipate U-boat movements. Together, these measures significantly reduced the effectiveness of the U-boat campaign.