20 April uprising

In early 1851, the opposition advanced candidate José María de la Cruz in the presidential election to oppose then-president Manuel Bulnes's preferred successor, Manuel Montt.^[6] Concerned that the election might not end in their favor, Cruz and other opposition groups decided to attempt a military coup, to be carried out in Santiago by Colonel Pedro Urriola Balbontín.

At dawn on 20 April, Urriola and his companions seized the main streets of Santiago and stormed the army barracks to arm more men, but few of the soldiers they had hoped for joined in the uprising. Two loyalist battalions organized to face the rebels and prepared a counteroffensive from the Alameda and Santa Lucia Hill. The fighting lasted about five hours, after which Urriola was killed along with more than 200 others.^[6]

25–26 June presidential elections

When the government announced that Montt had won the election by a wide margin, Cruz accused the regime of electoral fraud and declared the election void. He also alleged that government agents were conspiring to assassinate him, but the men accused were acquitted by the Chilean courts.^[7] After that Cruz withdrew to Concepción from Santiago.^[7] Small protests began in Concepción, Coquimbo and Maule, which would gradually escalate into open rebellion. In the meantime, the government began arresting political opponents.

September uprisings

Days before Manuel Montt assumed power on 18 September 1851, dissident uprisings seized power in Concepción and La Serena.^[8] According to historian Alberto Edwards the uprising was not only rooted in liberalism but also in provincialism.

The revolution in La Serena was led by Pedro Pablo Muñoz, the brothers Antonio and Ignacio Alfonso, and other notable residents of the city, who organized a revolutionary militia of 600 men from La Serena, Ovalle and Illapel. Calling themselves the "Restorers of the North," they were commanded by José Miguel Carrera Fontecilla. A revolutionary government was formed in the city, declaring the abolition of the Constitution of 1833. After a defeat by government forces in the Battle of Petorca, the city was besieged.

The uprising in Concepción, by contrast, had little to do with liberalism, as José María de la Cruz and other Concepción strongmen were pelucones (conservatives). Instead, historian Fernando Silva (1974) claims that the election of Montt meant the loss of the political hegemony Concepción had enjoyed in the 1829–1851 period under the presidents José Joaquín Prieto and Manuel Bulnes, both of whom were from that city. Because of this the Concepción elite would have supported the overthrow of the Montt regime.^[9] Cruz armed a group of four thousand men, including liberal supporters, rebel troops, mountaineers, and warriors of the Mapuche chieftain Mañil. According to historian José Bengoa, the Mapuches saw the central government in Santiago as their main enemy, explaining their participation on the side of Cruz in the Concepción-based revolt.^[10] Cruz had previously been in charge of the Army of the South and had helped to prevent a possible Mapuche-Chilean war arising from the wreck of Joven Daniel in 1849.^[11]

Later uprisings

On 28 October another uprising began in Valparaíso, led by artisans of the Society of Brotherhood (the surviving local chapter of Society of Equality). The Valparaíso mutiny was led by Rafael Bilbao and José Antonio Riquelme.^[12]

On 21 November a Chilean naval officer named José Miguel Cambiazo led a mutiny in Punta Arenas, which was eventually put down by the Chilean navy.^[13]

End of the revolution

Meanwhile, the revolution was still raging in the north. However, the defeat of the Liberals in Petorca made them remain in the Province of Coquimbo, while some mining businessmen favoring the Government, decided to create a counterrevolutionary army under the command of Ignacio José Prieto.

In the meantime, an Government army detachment under the command of Juan Vidaurre-Leal Morla and Victorino Garrido landed in Papudo and headed towards the province of Coquimbo with 4,000 soldiers.^[14] These joined Prieto and marched to La Serena, a city that had barely 1,000 men for its defense, under the command of José Miguel Carrera Fontecilla, son of the Father of the Nation of the same name.^[15] Even so, the Liberals continued their resistance. After the defeat of the Concepción revolutionaries in the Battle of Loncomilla on 8 December, the Revolution had lost its drive and was reduced to an isolated stronghold in the city of La Serena.
However, on 26 December, a revolution broke out in Copiapó by the forces under the command of Bernardino Barahona. Most of the soldiers who defended La Serena, moved north to support this new revolution. At the end of December, La Serena, with its empty trenches, was easily occupied by Government forces, without an armistice having been negotiated between the both sides.
On 8 January 1852, the Revolutionary forces of Copiapó were defeated in Linderos de Ramadilla by the Chilean army, ending the uprising in the provinces.