World War II Sea War, Volume 20Volume 20 of the World War II Sea War series provides additions and corrections to the information originally provided in Volume 5 of the series. As in Volumes 18 and 19, the General sections have been expanded to help form the overall context of the war, especially how world leaders made decisions day by day. Much of Volume 20 expands on Imperial Japanese Navy and merchant ship movements as Japan prepared to bring the United States into the War. In