The Importance of Underseas Refueling

In the 1930s there were very few modern examples of large amphibious operations, especially ones that were launched against contested beaches. This left amphibious operations as an area of military theory with many more questions than answers. The three nations that would have the greatest need for amphibious operations during the Second World War were Britain, Japan, and the United States. There was not a dedicated set of infantry units that could perform the landings in these countries. On the other side of the world, unlike the Royal Navy, Japanese military put a huge amount of resources behind how they planned to start a war.