Mariana Islands

The Mariana Islands (also the Marianas) are a crescent-shaped archipelago comprising the summits of fifteen mostly dormant volcanic mountains in the western North Pacific Ocean, between the 12th and 21st parallels north and along the 145th meridian east. They lie south-southeast of Japan, west-southwest of Hawaii, north of New Guinea and east of the Philippines, demarcating the Philippine Sea's eastern limit. They are found in the northern part of the western Oceanic sub-region of Micronesia, and are politically divided into two jurisdictions of the United States: the Commonwealth of the Northern Mariana Islands and, at the southern end of the chain, the territory of Guam.

The islands were named after the Spanish queen Mariana of Austria. Spaniards, who in the early 16th century were the first Europeans to arrive, eventually annexed and colonized the archipelago. The indigenous inhabitants are the Chamoru. Archaeologists in 2013 reported findings which indicated that the people who first settled the Marianas arrived there after making what was at the time the longest uninterrupted ocean voyage in human history. They further reported findings which suggested that Tinian is likely to have been the first island in Oceania to have been settled by humans.