Raid on Callao . The Freire Expedition had a secondary result. Portales decided to take the offensive and staged a surprise raid to prevent further interference by the Confederate government in Chilean internal affairs. He gave command of the small Chilean fleet to the Spanish sailor
Victorino Garrido and ordered him to raid the Confederate fleet that was stationed in the port of
Callao. Garrido, who arrived with the
brigantine Aquiles on a goodwill visit, staged a silent attack on the night of August 21, 1836, managing to capture 3 confederate ships: the
Santa Cruz,
Arequipeño and
Peruviana.
Chilean declaration of war Instead of immediately going to war, Marshal
Andrés de Santa Cruz tried to negotiate with Chile. The Chilean Congress sent
Mariano Egaña as plenipotentiary to negotiate a treaty based on several points: the payments of the outstanding international debts owed by Peru to Chile, the limitation of the outstanding armies, commercial agreements, compensation to Chile for the Freire Expedition, and the dissolution of the Confederation. Santa Cruz agreed to everything but the dissolution. Chile responded by declaring war on December 28, 1836. The international situation was not favorable to the Chilean interests. Marshal Santa Cruz and the Confederation had been diplomatically recognized by the principal world powers with interests in the region (
Great Britain,
France and the
United States), while the possible Chilean allies (
Argentina and
Ecuador) had decided to remain neutral in the conflict.
Argentine declaration of war Nonetheless, the involvement of Marshal Santa Cruz in Argentina's internal affairs by his continued support to the opponents of
caudillo Juan Manuel de Rosas, moved this country to also declare war on May 9, 1837, in support of the northern province of
Tucumán, which was threatened by Santa Cruz's forces. France supported Santa Cruz's war effort by imposing a
naval blockade over
Buenos Aires, an ill-fated attempt to remove Rosas from power. Also, France took advantage of the Uruguayan Civil War and the Argentine Civil Wars, supporting
Fructuoso Rivera and
Juan Lavalle against
Manuel Oribe and Rosas. In a letter that he sent to Governor Heredia on January 10, 1837, Rosas acknowledged that he was not in a position to confront General Santa Cruz: Even though Chile and Argentina were acting against the same perceived threat, both countries went to war independently, due to the intense dislike between Portales and Rosas, and both countries continued to act separately throughout the whole course of the conflict. In 1837 Santa Cruz's forces defeated an Argentine army sent to topple him. If, as Rosas himself claimed, the forces of the Argentine Confederation were not in a position to sustain operations in the North against the Bolivian armies, why was Rosas determined to war against the government of Santa Cruz? The obvious answer is that the Governor of Buenos Aires calculated that the Chilean forces were far superior to those of Santa Cruz, and that the alliance with the Chilean government would destroy the nest of anti-riot conspirators that Bolivia had become. For Chile, the war against the Peruvian-Bolivian Confederation was decisive: commercial supremacy and the balance of power in the Pacific were discussed. For the Argentine Confederation, on the other hand, this war was more important for internal politics than economic and strategic. The economic damages suffered by the Rosas government because of Santa Cruz were relatively limited, the main one being the 40% tax on overseas merchandise brought into Bolivia from the Argentine provinces. These economic damages did not in themselves justify a war and in principle could be resolved peacefully. If Rosas finally decided in favor of the war, it was because of his implications against his internal enemies, and also because the eventual defeat of Santa Cruz would perhaps allow him to demand the restitution of the province of Tarija. But the latter concerned more the Northern provinces than Rosas himself and the Litoral provinces. Finally, and as a consequence of these considerations, Rosas resolved that it would be the northern provinces that, in defense of their immediate interests, would bear the brunt of the warlike actions.
Assassination of Portales The Chilean government, in order to bolster its sagging standing with public opinion (which was opposed to a war they did not understand), imposed martial law and asked for (and obtained) extraordinary legislative powers from Congress. Early in 1837 a Court Martial Law was approved and given jurisdiction over all citizens for the duration of the war. The opposition to the
Prieto administration immediately accused
Portales of tyranny, and started a heated press campaign against him personally and the unpopular war in general. Image:Blanco Encalada(2).jpeg|Chilean Rear Admiral Manuel Blanco Encalada Image:Juan Manuel De Rosas.jpg|Argentine General Juan Manuel de Rosas Image:Agustin Gamarra.jpg|Peruvian General Agustin Gamarra Image:JuanManueldeRosas.png|
Juan Manuel de Rosas, Head of Foreign Relations of the Argentine Confederation Political and public opposition to war immediately affected the army, fresh still from the purges of the
civil war of 1829-1830. On June 4, 1837, Coronel
José Antonio Vidaurre, commander of the "Maipo" regiment, captured and imprisoned Portales while he was reviewing troops at the army barracks in
Quillota. Vidaurre immediately proceeded to attack
Valparaíso on the mistaken belief that public opinion opposed to the war would support him and topple the government. Rear Admiral
Manuel Blanco Encalada, in charge of the defense, defeated him right outside the port at the
Battle of Baron. Captain
Santiago Florín, who was in charge of Portales, had him shot when he heard of the news, on June 6, 1837. Most of the conspirators were subsequently captured and executed. This murder, which was perceived as having been orchestrated by Marshal Santa Cruz, turned the tide of Chilean public opinion against the Confederation. The government later had martial law revoked nationwide and the country rallied behind the government. The war became a holy cause, and Portales its martyr. ==First campaign==