According to Eisenhower, Japan's trading business will be in danger if Communism expanded to Asia.
Japan relied on countries in South East Asia to buy their resources that they use in their production. If these countries (such as thailand, Indonesia, and myanmar) falls to communists, Japan will be imposed a heavy tariff to acquire their normal amount of materials.
It's 2017 now so it was 2517 years ago to 500bc and 1517 to 500AdD
