Humans have inhabited the atoll for at least 2,000 years.[4]
Majuro Atoll was claimed by the German Empire with the rest of the Marshall Islands in 1884, and the Germans established a trading outpost. As with the rest of the Marshalls, Majuro was captured by the Imperial Japanese Navy in 1914 during World War I and mandated to the Empire of Japan by the League of Nations in 1920. The island then became a part of the Japanese mandated territory of Nanyo; although the Japanese had established a government in Nanyo, local affairs were mostly left in the hands of traditional local leaders until the start of World War II.
U.S. Fifth Fleet at Majuro Atoll 1944.
On January 30, 1944, United States troops invaded, but found that Japanese forces had evacuated their fortifications to Kwajalein and Enewetak about a year earlier. A single Japanese warrant officer had been left as a caretaker. With his capture, the islands were secured. This gave the U.S. Navy use of one of the largest anchorages in the Central Pacific. The lagoon became a large forward naval base of operations and was the largest and most active port in the world until the war moved westward when it was supplanted by Ulithi (Yap, Federated States of Micronesia).[5]
Following World War II, Majuro came under the control of the United States as part of the Trust Territory of the Pacific Islands. It supplanted Jaluit Atoll as the administrative center of the Marshall Islands, a status that it retains after the independence of the Marshall Islands in 1986.