What did the line of demarcation and treaty of tordessillas do in South America Gave all of the land in south America Spain or gave all the land and South America to Portugal for Spain and Portugal to give back all colonies land or divide absolute land in south America between Spain and Portugal

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The Treaty of Tordesillas, signed in 1494, divided the newly discovered lands outside Europe between Portugal and Spain along a meridian 370 leagues west of the Cape Verde islands (approximately 46°30′ W). This agreement aimed to prevent conflict between the two European powers over newly discovered territories.

As a result, the line of demarcation established by the Treaty of Tordesillas effectively divided South America into Portuguese-controlled territory in the east and Spanish-controlled territory in the west. This division had a lasting impact on the colonization and development of South America, with Portugal gaining control over present-day Brazil and Spain taking control of the majority of the rest of the continent.