Naval Blockade During the World War, the Allied naval blockade brought German foreign trade practically to a standstill, especially after 1916. It contributed significantly to the serious subsistence problems in Germany. On the eve of the World War Germany was one of the most important economic powers in the world. Obviously, accomplishing this required extensive trade relationships. This left the German economy highly vulnerable during such a long-lasting war. Indeed, Germany had to import 30% of all processed iron ore. The …