The Allies gradually gained the upper hand, overcoming German surface raiders by the end of 1942 and defeating the U-boats by mid-1943, though losses due to U-boats continued until the war's end.
Sekutu secara bertahap meraih kemenangan, mengatasi kapal perang Jerman menjelang akhir tahun 1942 dan mengalahkan U-boat pada pertengahan tahun 1943, meskipun kerugian akibat U-boat terus terjadi sampai akhir perang.