How did Argentina's territory change over time?

Argentina was originally inhabited by indigenous tribes before being colonized by Spain, which later established the Viceroyalty of the Río de la Plata, covering a vast portion of South America. In 1816, Argentina declared independence, and the viceroyalty broke apart. Argentina continued to claim much of the former territory, including areas that would become Bolivia, Paraguay, and Uruguay, although Uruguay eventually became an independent state.

During the 19th century, much of Patagonia remained outside Argentine control and was inhabited by indigenous peoples. Argentina launched military campaigns to expand southward and establish control over the region, significantly increasing the territory it governed. Patagonia was also claimed by Chile, leading to border disputes that nearly resulted in war before both countries agreed on a permanent border. Following the War of the Pacific, Argentina acquired additional territory from Bolivia. Argentina also claims a sector of Antarctica, although Antarctic territorial claims are not internationally recognized under current treaty arrangements. In 1982, Argentina invaded the Falkland Islands, but the United Kingdom quickly regained cont