With the concentrated use of anti-submarine ships and aircraft.
By sinking them!
Supplying the allies with armaments and food supplies across the Atlantic ocean with great resistance from German u boat submarines
Warships traveled with Merchant ships for protection.
The allies pushed the German armies back from the 'Atlantic Wall' and advanced into France
Warships traveled with merchant ships for protection
Warships traveled with Merchant ships for protection.
Warships traveled with Merchant ships for protection.
Warships traveled with Merchant ships for protection.
During WW1, German U-boats (submarines) used torpedoes to sink boats and ships belonging to the Allies or any vessel aiding the Allies war cause.
During World War 2 the major supply line of the Allies was the supply line created by cargo ships crossing the Atlantic Ocean with war supplies headed to England. The most common threat was from German submarines.
During World War II, the Allies achieved numerous victories at sea. In the Pacific, an early (and quite pivotal) victory occurred in the Battle of Midway against the Japanese in 1942. In the Atlantic, the Allies overcame the German submarine campaign during 1943.
America's support of the allies led Hitler to attack American ships.