A Cartoons making fun of the Allies shipping, the Germans were destroying all the precious materials that Britain was relying on throughout the war. Without them Britain was struggling and wasn't able to make due to its promises in regaining control of the sea, until the help of the Americans and Canadians. The U-boats was a major problem and was the main obstacle for the allies to dodge or counter attack. Many ships were lost in Battle of the Atlantic. U-boats were a great advantage for the Axis.​​