The U-Boat war in the Irish Channel During World War 1
Soon after America declared war in 1917, the unsustainable number of Allied and neutral ships being sunk began to decline. This marked a turning point in U-Boat tactics that resulted in a dramatic increase in the number of attacks against shipping in the narrow seas that separate Ireland and Britain.
Mines were laid across the approaches to the ports of Holyhead, Liverpool, The Clyde, Belfast, Dublin and Arklow. The U-Boats were fired on, depth charged, rammed and sunk by the allied warships of Great Britain and the United States. Preventing food, men and materials reaching Britain had remained the key to a German victory. The story of the part Ireland played in preventing Britain starving during World War 1 has remained untold.