Ecuadorian-Peruvian war

War of 1941
Part of the Ecuadorian–Peruvian Conflicts
A ship of the Peruvian navy in Ecuadorian waters during the conflict.
Date 5 July 1941 – 31 January 1942 Location Ecuadorian-Peruvian border; Ecuadorian Provinces of El Oro, Loja, Sucumbios, and Oriente Result Peruvian Victory: Signing of the
Belligerents
Peru	Ecuador
Commanders and leaders
Manuel Prado y Ugarteche Eloy G. Ureta	Carlos Alberto Arroyo del Río Luis Rodríguez
Strength
By 5 July 1941: 15,723 troops 11 tanks 24 guns of the Agrupamiento del Norte Later: 68,100 troops 24 tanks 120 guns 132,000 parmilitary and militia	In Amazonia: 5,300 troops 8 guns. In Quito: 12,000 troops
At the beginning of offensive, numbers have been estimated between 15,200 and 30,000 men.

Peruvian Victory:

By 5 July 1941:
15,723 troops
11 tanks
24 guns of the Agrupamiento del Norte
Later:

In Amazonia:
5,300 troops
8 guns.
In Quito:

The Ecuadorian–Peruvian War, known locally as the War of '41 (Spanish: Guerra del 41), was a South American border war fought between 5–31 July 1941. It was the first of three military conflicts between Ecuador and Peru during the 20th century. During the war, Peru occupied the western Ecuadorian province of El Oro and parts of the Andean province of Loja. Although the Ecuadorian–Peruvian War occurred during World War II, it was not part of the conflict; Ecuador and Peru were affiliated neither to the Allies or Axis nor supported by either side.

A ceasefire agreement between the two countries came into effect on 31 July 1941. Both countries signed the on 29 January 1942, and Peruvian forces subsequently withdrew. The enmity over the territorial dispute continued after 1942 and concluded following the Cenepa War of 1995 and the signing of the Brasilia Presidential Act agreement in October 1998.

The dispute between Ecuador and Peru dates from 1840. It revolved around whether Ecuador's territory extended beyond the Andes mountain range to the Marañon (Amazon) river, including the Amazonian basin.

As early as 1829, Peru fought against the Gran Colombia (a large loose state encompassing most of northern South America), of which the disputed lands were a part. After a series of battles, the war ended in what is known as the Battle of Tarqui (or Portete de Tarqui). The Gual-Larrea Treaty was signed on 22 September 1829 ending the war. This treaty, better known as the Treaty of Guayaquil, specified that the Gran Colombian-Peruvian border was to be the same border that had existed between the Spanish colonial viceroyalties of Nueva Granada and Lima.

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