Question: how did world war ii represent new technology how did this technology affect the outcome of the war

title: Technology during World War II
text: The German U-boats were used primarily for stopping / destroying the resources from the United States and Canada coming across the Atlantic . Submarines were critical in the Pacific Ocean as well as in the Atlantic Ocean . Advances in submarine technology included the snorkel . Japanese defenses against Allied submarines were ineffective . Much of the merchant fleet of the Empire of Japan , needed to supply its scattered forces and bring supplies such as petroleum and food back to the Japanese Archipelago , was sunk . Among the warships sunk by submarines was the war 's largest aircraft carrier , the Shinano .