Guaraní War

The Guaraní War (Spanish: Guerra Guaranítica, Portuguese: Guerra Guaranítica; literally, Guaranitic War) of 1756, also called the War of the Seven Reductions, took place between the Guaraní tribes of seven Jesuit Missions and joint Spanish-Portuguese forces. It was a result of the 1750 Treaty of Madrid, which set a line of demarcation between Spanish and Portuguese colonial territory in South America.