History of the Marshall Islands several in Micronesia. On September 29, 1914, Japanese troops occupied the Enewetak Atoll, and on September 30, 1914, the Jaluit Atoll, the administrative centre of the Marshall Islands. After the war, on June 28, 1919, Germany signed (under protest) the Treaty of Versailles. It renounced all of its Pacific possessions, including the Marshall Islands. On December 17, 1920, the Council of the League of Nations approved the South Pacific Mandate for Japan to take over all former German colonies in the Pacific Ocean located north of the Equator. The Administrative Centre of the Marshall Islands archipelago remained Jaluit. The German
History of the Marshall Islands kilotons, over 7,200 times more powerful than the atomic weapons used during World War II." With the 1952 test of the first U.S. hydrogen bomb, code named "Ivy Mike," the island of Elugelab in the Enewetak atoll was destroyed. In 1956, the United States Atomic Energy Commission regarded the Marshall Islands as "by far the most contaminated place in the world." Nuclear claims between the U.S. and the Marshall Islands are ongoing, and health effects from these nuclear tests linger. Project 4.1 was a medical study conducted by the United States of those residents of the Bikini Atoll exposed to