Despite their efforts, the Axis powers were unable to prevent the build-up of Allied invasion forces for the liberation of Europe. In November 1942, at the height of the Atlantic campaign, the US Navy escorted the Operation Torch invasion fleet across the Atlantic without hindrance, or even being detected. (This may be the ultimate example of the Allied practise of evasive routing.) In 1943 and 1944 the Allies transported some 3 million American and Allied servicemen across the Atlantic without significant loss. By 1945 the USN was able to wipe out a wolf-pack suspected of carrying V-weapons in the mid-Atlantic, with little difficulty .