Oil is an essential lubricant in your engine. It lets metal press against metal without damage. For example, it lubricates the pistons as they move up and down in the cylinders.
1 By the time of the Japanese surrender in August 1945, Korea was the second-most industrialized nation in Asia after Japan itself.  But the wartime mobilization of 1937-45 had reintroduced harsh measures to Japanese colonial rule, as Koreans were forced to work in Japanese factories and were sent as soldiers to the front.
U.S.-NORTH KOREA RELATIONS. The United States and Koreaâs Joseon Dynasty established diplomatic relations under the 1882 Treaty of Peace, Amity, Commerce, and Navigation, and the first U.S. diplomatic envoy arrived in Korea in 1883. U.S.-Korea relations continued until 1905, when Japan assumed direction over Korean foreign affairs.