The Federated States of Micronesia (FSM), or simply Micronesia ( ), is an island country in Micronesia, a region of Oceania. The federation encompasses the majority of the Caroline Islands (excluding Palau) and consists of four states—from west to east: Yap, Chuuk, Pohnpei, and Kosrae—that span the western Pacific just north of the equator for a longitudinal distance of almost 2,700 km (1,700 mi). Together, the states comprise around 607 islands and a combined land area of approximately 702 km2 or 271 sq mi.
The entire island federation lies across the northern Pacific accordingly: northeast of Indonesia and Papua New Guinea, south of Guam and the Marianas, west of Nauru and the Marshall Islands, east of Palau and the Philippines, about 2,900 km (1,800 mi) north of eastern Australia, 3,400 km (2,100 mi) southeast of Japan, and some 4,000 km (2,485 mi) southwest of Honolulu of the Hawaiian Islands.
The country's total land area is relatively small, but its waters occupy nearly 3 million km2 (1.2 million mi2) of the Pacific Ocean, giving the country the 14th-largest exclusive economic zone in the world. The nation's capital is Palikir, on Pohnpei Island, and its largest city is Weno, an island municipality in the Chuuk Lagoon.
Each of its four states is centered on one or more main volcanic islands, and all but Kosrae include numerous outlying atolls. The FSM spreads across part of the Caroline Islands in the wider region of Micronesia, which region consists of thousands of small islands divided among several countries. The term Micronesia may refer to the Federated States of Micronesia or to the region as a whole.
The FSM was a part of the former Trust Territory of the Pacific Islands (TTPI), a United Nations Trust Territory administered by the United States from 1947 to 1994. On May 10, 1979, the islands ratified a constitutional government and then became a sovereign state after attaining independence on November 3, 1986—under a Compact of Free Association with the United States. Other neighboring island entities (also former members of the TTPI) also formed constitutional governments, becoming the Republic of the Marshall Islands and the Republic of Palau. The FSM has a seat in the United Nations and has been a member of the Pacific Community since 1983.
Early settlement and Nan Madol
The ancestors of the Micronesians settled over four thousand years ago. A decentralized chieftain-based system eventually evolved into a more centralized economic and religious culture centered on Yap Island.
Nan Madol, a UNESCO World Heritage Site, consisting of a series of small artificial islands linked by a network of canals, is often called the Venice of the Pacific. It is located on the eastern periphery of the island of Pohnpei and used to be the ceremonial and political seat of the Saudeleur dynasty that united Pohnpei's estimated 25,000 people from about AD 500 until 1500 when the centralized system collapsed.
European contact and colonial rule
European explorers—first the Portuguese in search of the Spice Islands (Indonesia) and then the Spanish—reached the Carolines in the sixteenth century. The Treaty of Tordesillas gave these lands to Spain and the Spanish incorporated the archipelago to the Spanish East Indies through the capital, Manila, and in the 19th century established several outposts and missions. In 1887, they founded the town of Santiago de la Ascensión in what today is Kolonia on the island of Pohnpei.
In the 1870s, Germany began extending its sphere of influence in the Caroline Islands, leading to the Carolines Question of 1885 in which Pope Leo XIII was asked to determine if Germany or Spain had authority over the islands. The result was a confirmation of Spanish authority over the islands, but Germany would have free access to the islands.
Following defeat in the Spanish–American War, the Spanish sold the archipelago to Germany in 1899 under the German–Spanish Treaty of 1899. Germany incorporated it into German New Guinea. (A few remote islands, notably Kapingamarangi, were not specifically named in the treaty, but this remained unnoticed until the late 1940s and, while acknowledging the historical curiosity in 1949, Spain has made no modern claims to the islands.)
During World War I, it was captured by Japan. Following the war, the League of Nations awarded a mandate for Japan to administer the islands as part of the South Seas Mandate.
World War II and the aftermath
Truk Lagoon served as a significant base for the Imperial Japanese Navy during World War II. In February 1944, the U.S. Navy launched Operation Hailstone, a massive air and surface attack on Truk Lagoon. Over two days, U.S. carrier aircraft and surface vessels targeted Japanese warships, merchant vessels, and shore installations, resulting in the sinking of numerous ships and the destruction of hundreds of aircraft. This operation severely diminished Japan's naval capabilities in the Pacific.
U.S. administration under the United Nations
Following World War II, the islands of Micronesia were placed under the administration of the United States as part of the Trust Territory of the Pacific Islands. This arrangement was formalized on 2 April 1947, with the adoption of United Nations Security Council Resolution 21, which approved the terms of trusteeship for the Pacific Islands formerly under Japanese mandate.
On May 10, 1979, four of the Trust Territory districts ratified a new constitution to become the Federated States of Micronesia. Palau, the Marshall Islands, and the Northern Mariana Islands chose not to participate. The FSM signed a Compact of Free Association with the United States, which entered into force on November 3, 1986, marking Micronesia's emergence from trusteeship to independence. Independence was formally concluded under international law in 1990, when the United Nations officially ended the Trusteeship status pursuant to Security Council Resolution 683. The Compact was renewed in 2004.