the conservative land owners of the highlands, and this liberal wing retained power until the military "Julian Revolution" of 1925. The 1930s and 1940s were marked by instability and emergence of populist politicians, such as five-time President José María Velasco Ibarra.
War with Peru
Control over territory in the Amazon basin led to a long-lasting dispute between Ecuador and Peru. In 1941, amid fast-growing tensions between the two countries, war broke out. Peru claimed that Ecuador's military presence in Peruvian-claimed territory was an invasion; Ecuador, for its part, claimed that Peru had invaded Ecuador. In July 1941, troops were mobilized in both countries. Peru had an army of 11,681 troops who faced a poorly supplied and inadequately armed Ecuadorian force of 2,300, of which only 1,300 were deployed in the southern provinces. Hostilities erupted on July 5, 1941, when Peruvian forces crossed the Zarumilla river at several locations, testing the strength and resolve of the Ecuadorian border troops. Finally, on July 23, 1941, the Peruvians launched a major invasion, crossing the Zarumilla river in force and advancing into the Ecuadorian province of El Oro.
During the course of the war, Peru gained control over part of the disputed territory and some parts of the province of El Oro, and some parts of the province of Loja, demanding that the Ecuadorian government give up its territorial claims. The Peruvian Navy blocked the port of Guayaquil, almost cutting all supplies to the Ecuadorian troops. After a few weeks of war and under pressure by the United States and several Latin American nations, all fighting came to a stop. Ecuador and Peru came to an accord formalized in the Rio Protocol, signed on January 29, 1942, in favor of hemispheric unity against the Axis Powers in World War II favoring Peru with the territory they occupied at the time the war came to an end.
Recession and popular unrest led to a return to populist
