 Through the founding of Fort Bulnes by the Schooner Ancud under the command of John Williams Wilson, the Magallanes region joined the country in 1843, while the Antofagasta region, at the time part of Bolivia, began to fill with people.Toward the end of the 19th century, the government in Santiago consolidated its position in the south by the Occupation of Araucanía.The Boundary treaty of 1881 between Chile and Argentina confirmed Chilean sovereignty over the Strait of Magellan.