The Tordesillas Treaty, signed on June 7, 1494, was a landmark agreement between Spain and Portugal that divided the New World into two spheres of influence, with a meridian 370 leagues west of the Cape Verde Islands as the dividing line. This treaty had far-reaching consequences, shaping the borders of the Americas and beyond. In this article, we will explore five ways the Tordesillas Treaty defined borders and its lasting impact on global geography.
Key Points
- The Tordesillas Treaty established a dividing line between Spanish and Portuguese territories in the Americas.
- The treaty led to the creation of distinct border zones, including the border between present-day Brazil and Spanish America.
- The treaty's influence extended beyond the Americas, shaping borders in Africa and Asia.
- The treaty's division of the New World contributed to the development of distinct cultural and linguistic identities in the Americas.
- The Tordesillas Treaty's legacy can still be seen in modern-day border disputes and territorial claims.
Division of the Americas

The Tordesillas Treaty’s most immediate and lasting impact was the division of the Americas between Spain and Portugal. The treaty established a meridian, known as the Tordesillas Meridian, which ran from the North Pole to the South Pole, 370 leagues west of the Cape Verde Islands. All lands to the west of this meridian were assigned to Spain, while all lands to the east were assigned to Portugal. This division had a profound impact on the development of the Americas, shaping the course of colonization, trade, and cultural exchange.
Border between Brazil and Spanish America
The Tordesillas Treaty created a distinct border zone between present-day Brazil and Spanish America. The treaty’s dividing line ran through the heart of South America, separating the Portuguese colony of Brazil from the Spanish colonies of Peru, Chile, and Argentina. This border has remained relatively stable to this day, with some minor adjustments over the centuries. The border between Brazil and Spanish America is a testament to the lasting legacy of the Tordesillas Treaty, which defined the territorial boundaries of the Americas and shaped the course of colonial history.
| Country | Border Length (km) |
|---|---|
| Brazil-Argentina | 1,224 |
| Brazil-Uruguay | 1,068 |
| Brazil-Paraguay | 1,290 |
| Brazil-Peru | 2,510 |
| Brazil-Colombia | 1,790 |

Influence beyond the Americas

The Tordesillas Treaty’s influence extended beyond the Americas, shaping borders in Africa and Asia. The treaty established a precedent for the division of territories and the recognition of territorial claims, which was later applied to other regions of the world. For example, the treaty’s concept of a dividing line was used to establish the border between Portuguese East Africa (present-day Mozambique) and Spanish West Africa (present-day Equatorial Guinea). Similarly, the treaty’s principles were applied to the division of territories in Asia, including the border between Portuguese India (present-day Goa) and Spanish Philippines.
Legacy of the Tordesillas Treaty
The Tordesillas Treaty’s legacy can still be seen in modern-day border disputes and territorial claims. The treaty’s division of the Americas and its influence on global geography have contributed to ongoing debates over territorial sovereignty and border demarcation. For example, the border dispute between Brazil and Uruguay over the territory of Rio Grande do Sul is a direct result of the Tordesillas Treaty’s division of the Americas. Similarly, the dispute between Argentina and Chile over the territory of Patagonia is a legacy of the treaty’s influence on the border between Spanish America and Portuguese Brazil.
What was the main purpose of the Tordesillas Treaty?
+The main purpose of the Tordesillas Treaty was to divide the New World into two spheres of influence, with a meridian 370 leagues west of the Cape Verde Islands as the dividing line. This division was intended to prevent conflict between Spain and Portugal over territorial claims in the Americas.
How did the Tordesillas Treaty shape the borders of the Americas?
+The Tordesillas Treaty established a distinct border zone between present-day Brazil and Spanish America, separating the Portuguese colony of Brazil from the Spanish colonies of Peru, Chile, and Argentina. This border has remained relatively stable to this day, with some minor adjustments over the centuries.
What is the legacy of the Tordesillas Treaty in modern-day border disputes?
+The Tordesillas Treaty's legacy can still be seen in modern-day border disputes and territorial claims, highlighting the enduring impact of this landmark agreement on global geography. The treaty's division of the Americas and its influence on global geography have contributed to ongoing debates over territorial sovereignty and border demarcation.
In conclusion, the Tordesillas Treaty was a landmark agreement that defined the borders of the Americas and shaped the course of colonial history. The treaty’s influence extended beyond the Americas, shaping borders in Africa and Asia, and its legacy can still be seen in modern-day border disputes and territorial claims. As we reflect on the Tordesillas Treaty’s enduring impact on global geography, we are reminded of the importance of understanding the complex historical context that has shaped our world today.