History: Treaty of Tordesillas
Self-tutoring about history: the tutor mentions an important historic treaty.
The Treaty of Tordesillas was signed in 1494 by Spain and Portugal. It divided the world between them along approximately 46°30′ W, which runs through the Atlantic and what is now Brazil. Any territory east of that line belonged to Portugal; anything west, to Spain. Moreover, it allowed either country to sail anywhere for the purpose of transport.
To a great extent, the treaty was honoured by both countries, which is why Brazil remained Portuguese and Spain did not colonize Africa. Conversely, Central America and the west coast of South America were colonized by Spain but not Portugal.
Source:Oracle Tutoring by Jack and Diane, Campbell River, BC.