September 4th, 2011
there was an arms race as the restrictions were lifted, or ignored by Hitler, as Germany planned for war in 1944. By that year, Germany expected to have a strong surface fleet and a large submarine force. When Hitler miscalculated in invading Poland in 1939, German was suddenly at war with few U-Boats in service. All of the designs were based on 1914-1918 War designs. They were all relatively small submarines and many were only coastal types, unsuitable for deployment to the Atlantic from German ports.