Data

Name: First Treaty of San Ildefonso

Type: Event

Start: 1777 AD

End: 1777 AD

Parent: Spanish-Portuguese War (1776-77)

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Icon First Treaty of San Ildefonso

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Was a treaty between Spain and Portugal that settled long-running territorial disputes between the two kingdoms' possessions in South America, primarily in the Río de la Plata region.

Chronology


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  • October 1777: On 24 February 1777 King Joseph I died and his daughter and successor Maria I dismissed Pombal and concluded on 1 October the First Treaty of San Ildefonso with Spain. Spain returned the island of Santa Catarina to Portugal.
  • October 1777: In 1777, Portugal ceded Colonia del Sacramento to Spain as part of the Treaty of San Ildefonso.
  • October 1777: Misiones Orientales conquered by spain.

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