Failure to disrupt US shipping lanes to the Allies resulted in Germany having to fight much better-equipped Allied forces. A tank, a howitzer, or a truck on the

Failure to disrupt US shipping lanes to the Allies resulted in Germany having to fight much better-equipped Allied forces. A tank, a howitzer, or a truck on the bottom of the ocean is not a threat. The amount of equipment shipped to the USSR by the US is staggering as well, and one can argue that the Eastern Front would have collapsed without those supplies. More U-boats likely would have dramatically changed the war.