The Treaty of Tordesillas changed the Line of Demarcation

From Habele Institute

Levesque, Rodrigue (1992). "The Treaty of Tordesillas changed the Line of Demarcation". History of Micronesia: A Collection of Source Documents. Volume 1, European Discovery, 1521-1560. Gatineau, Quebec: Éditions Lévesque. pp. 73–78. ISBN 0-920201-01-6.

Abstract: The 1494 Treaty of Tordesillas adjusts the papal demarcation line westward. It confirms Portuguese rights that would include Brazil and affirms Spanish claims to much of the Americas, showing diplomatic partition as a means to manage imperial competition.