A territorial dispute between Ecuador and Peru took place between 1857 and 1860. The conflict began when Ecuador attempted to sell Amazonian land claimed by Peru in order to settle a debt with British creditors. When diplomatic relations between the two countries broke down, prior to the fragmentation of the Ecuadorian government into several competing factions, the Peruvian government ordered a blockade of Ecuador's ports in order to force the cancellation of the sale, and the official acknowledgement of Peruvian ownership of the disputed territories. By late 1859, power was divided between General Guillermo Franco, in the city of Guayaquil, and a provisional government in Quito headed by Gabriel García Moreno. Peruvian President Ramón Castilla sailed to Guayaquil with several thousand soldiers in October 1859, and negotiated the Treaty of Mapasingue with General Franco in January 1860. The signing of the treaty indicated Ecuadorian compliance with all of Peru's demands.

Castilla had originally pledged his support for García Moreno's efforts to subdue Franco's regime. García Moreno soon became aware of the agreement between Castilla and Franco. In an unsuccessful attempt to seek a powerful ally, García Moreno sent a series of secret letters to the chargé d'affaires of France, Emile Trinité, on December 7, 15 and 21, 1859; in them, he proposed that Ecuador become a protectorate of the European country. Fortunately for his cause, the agreement between Franco and Castilla had the effect of uniting the disparate governments of Ecuador against their new common enemy; El Traidor, the traitor Franco, who had betrayed them by dealing with the Peruvians on their terms. Resolving to aid García Moreno in ending the civil war, General Juan José Flores, the fourth president of Ecuador, deposed during the Marcist Revolution of 1845, offered his services as military commander to García Moreno, despite their prior differences. Recognizing Flores' superior knowledge of military tactics, García Moreno named him Commander of the army of the provisional government. With the support of large landowners and the church establishment, García Moreno and Franco mobilized the army towards Guayaquil, to take the city back from Franco and repel the Peruvian occupation. On the way, stopping in the city of Guaranda, García Moreno famously announced, "Soldiers, I order you to march on to victory!"

In a fortunate turn of events, Peru had become embroiled in a domestic revolt, as well as problems on the Bolivian front, forcing Castilla to return home on February 10, arriving in Callao on February 19. A contingent of Peruvians remained behind, along with several vessels; Franco's army was supplied with boots, uniforms, and 3,000 rifles.

On August 7, 1860, a small group of soldiers led by General Francisco Javier Salazar ambushed Guillermo Franco's forces at the future site of the city of Babahoyo, capital of the province of Los Ríos. Franco was forced to retreat to Guayaquil, where he could count on the support of the Peruvian vessels and men left behind by Castilla. García Moreno's victorious army, strengthened by deserters from Franco's forces, moved on to Daule, across the Guayas River from Guayaquil. The province of Manabí subsequently fell under control of the provisional government; its governor, Guillermo Franco's brother, Juan José Franco, retreated to Guayaquil to help his brother.

General Juan José Flores planned to retake Guayaquil by capturing its hinterlands, then proceeding to lay siege to the city proper. On the night of September 22, a part of the provisional government's army, led by Colonel José de Veintemilla, attacked the city from the north, while the bulk of Gabriel García Moreno's and Flores' forces approached from another direction, through swampland. Believing the forces approaching from the swamp to be the diversionary attack, Franco stationed his men in the north.

On September 23, Flores laid out his battle plan. Part of the army would attack Franco's forces at the Santa Ana hill, to the north of the city. The rest, under his and García Moreno's direct command, would cross the Salado estuary, to the west, and thus encircle Franco. The Paso del Salado ("Crossing of the Salado") was one of the defining moments of the battle; Flores' men had to face an enemy they were unprepared for, in the tropical terrain of the estuary, choked by mangroves and infested with alligators. Franco's Colonel Pedro Pablo Echeverría had been placed in charge of defending the Salado. However, in exchange for 3,000 pesos and the promise of a promotion to General in García Moreno's army, he betrayed Franco, and allowed the provisional government army to pass through the estuary. The bombing of the city began that day.

Early on the morning of September 24, the provisional government forces were in position for the final battle. Guayaquil quickly fell to Flores' and García Moreno's men. At the present-day location of the La Victoria park in Guayaquil, Franco and his men were defeated, fleeing in disarray. Many drowned attempting to reach the Peruvian ships in the harbor, which weighed anchor and set sail for Peru as they saw the battle being lost. It was aboard one of these ships that Franco and his leadership escaped, though other sources indicate that it was the Ecuadorian schooner Cuatro de Julio.

García Moreno and Flores spent the next months in Guayaquil, awaiting a Peruvian retaliation that never came. Franco, shamed by his defeat, never returned to Ecuador, and died in Callao, Peru, in March 1873.

The civil war that has stricken this wretched country for more than a year was ended, finally, by the triumph of the armies of the Provisional Government of Quito, over the troops of General Franco, Supreme Chief of the Province of Guayaquil.

— French Consulate in Quito, October 4, 1860

Two days after the capture of Guayaquil, García Moreno ordered Franco's blue-and-white banner taken down, and replaced with the flag of Ecuador. Franco's forces surrendered the city, and the Treaty of Mapasingue was annulled by the Ecuadorian Congress in 1861, and later by the Peruvian Congress in 1863 during the government of Miguel de San Román, on the grounds that "it was signed with the chief of a political party," an allusion to Franco's ephemeral government.

• History of Ecuador
• History of Peru
• History of Guayaquil

• Avilés Pino, Efrén (2004). "Batalla de Guayaquil". Enciclopedia del Ecuador (in Spanish). Archived from the original on September 25, 2021. Retrieved November 10, 2021.
• Avilés Pino, Efrén (2017) [Revised]. "Franco Gral. Guillermo" [Gen. Guillermo Franco]. Enciclopedia del Ecuador. Archived from the original on December 4, 2020.
• Espinosa Cordero, Simón (2002). "Los Gobiernos de la Crisis de 1859 – 1860: Ghuayaquil". Edición de Presidentes del Ecuador (in Spanish). Vistazo, 3ª. ADESP. Retrieved November 10, 2021. Article PDF available.

• Basadre, Jorge (1970). Historia de la República del Perú (in Spanish). Vol. IV. Lima: Editorial Universitaria S.A.
• Henderson, Peter V. N. (2008). Gabriel Garcia Moreno and Conservative State Formation in the Andes. LLILAS new interpretations of Latin America series. Vol. 1358. Austin, Texas, USA: University of Texas Press. doi:10.1007/b62130. ISBN 978-0-292-71903-3.

• Avilés Pino, Efrén; Hoyos Galarza, Melvin (2009). Historia de Guayaquil (in Spanish). Guayaquil: Municipalidad de Guayaquil.
• Campos, José Antonio (1999). Historia Documentada de las Provincias del Guayas (in Spanish). Vol. V. Guayaquil: Proyecto de Rescate Editorial de la Biblioteca Municipal de Santiago de Guayaquil. ISBN 9978-41-142-9.
• Holguín Arias, Rubén (2003). Estudios Sociales 6 (in Spanish) (1st ed.). Quito: Ediciones Holguín S.A.
• Gallegos Naranjo, Manuel (1900). Manual de Efemérides: Lecciones de historia del Ecuador (in Spanish). Ecuador: Tipografía "El Vigilante". p. 168. Retrieved February 27, 2010.
• Santamaría de Paredes, Vicente; Weston Van Dyke, Harry (1910). A study of the question of boundaries between the republics of Peru and Ecuador. Press of B.S. Adams.

• History of the Plaza de la Victoria

2°11′37″S 79°53′24″W / 2.193661°S 79.889885°W / -2.193661; -79.889885