Conflicts & Resolutions · War

Spanish–Portuguese War (1776–1777)

1776–1777 · 18th century

The Spanish–Portuguese War of 1776–1777 was fought over the borderlands of the Río de la Plata and southern Brazil. A large Spanish expedition under Pedro de Cevallos took the island of Santa Catarina and the colony of Sacramento in 1777. The First Treaty of San Ildefonso of 1777 gave Sacramento and the Banda Oriental to Spain and returned Santa Catarina to Portugal.

Spanish–Portuguese War (1776–1777)
Image: Carlos Julião · Public domain · Wikimedia Commons

Battles and settlements

Cite this entry
APA
The Epoch Institute. (2026). Spanish–Portuguese War (1776–1777). In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/spanish-portuguese-war-1776-1777
MLA
“Spanish–Portuguese War (1776–1777).” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/spanish-portuguese-war-1776-1777. Accessed .
Chicago
The Epoch Institute. “Spanish–Portuguese War (1776–1777).” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/spanish-portuguese-war-1776-1777.
Harvard
The Epoch Institute (2026) ‘Spanish–Portuguese War (1776–1777)’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/spanish-portuguese-war-1776-1777 (Accessed: ).

Last reviewed October 2026Random entry ↻