Mariana Islands

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The Mariana Islands (also the Marianas; up to the early 20th century sometimes called Islas de los Ladrones meaning "Islands of Thieves") are a group of islands made up by the summits of 15 volcanic mountains in the western Pacific Ocean.

They are the southern part of a submerged mountain range that goes on for 1,565 miles (2,519 km) from Guam to near Japan. The Marianas are the northernmost islands of a larger island group called Micronesia. The Marianas have a total land area of 396 square miles (1026 km²) and are composed of two administrative units:

The first European to discover the island group was Ferdinand Magellan in 1521. In 1667 Spain formally claimed them, and named them after Spanish Queen Mariana of Austria.