 Japan by itself had scant and meager resources and could not have prosecuted war against China or dreamed of empire without massive imports.The Dutch East Indies, the British Empire and United States of America were the top exporters of war supplies for Japan's military against China in 1937, with 7.4% from the Dutch, 17.5% from the British and 54.4% from the United States of America.Oil, scrap iron and rubber were all sold by France, the Netherlands, Britain and the U.S. to Japan after the invasion of China in 1937.