[1] He was the son of Melchor Albarracín and Tomasa Lanchipa Saco and cousin of Colonel Sergio Calisaya Reyna and nephew of General Daniel Ccorihuaman.

When the Peru-Bolivian Confederation was dissolved, Manuel Mendiburu, the new prefect of Tacna, appointed Gregorio Albarracín as his bodyguard with the rank of Lieutenant of Cavalry.

Albarracín participates in a guerrilla movement that defeats a Bolivian company in the Sama Valley and later, under the orders of Manuel Mendiburu, they face José Ballivián's forces until they are dislodged from Moquegua.

[3] On September 22, 1842, the Battle of the Intiorko occurs between the constitutional command of Ramón Castilla who defended the government that ousted President Manuel Menéndez and troops of the general Antonio Gutiérrez de La Fuente who supported the coup d'état of General Juan Francisco de Vidal.

Faced with this, the Vivanquistas sent Colonel Juan Balta's division to confront them and Albarracín and his men had to leave Arica to join the troops of Castile.

On August 29, 1843, the Battle of San Agustín de Pachía was fought, favorable to the constitutionalists, after which Albarracín obtained the rank of Captain of the National Guard of Tacna.

On October 28, 1843, the Battle of San Antonio occurred in Moquegua in which he faced against the Chilean Ricardo Apaza Yapuchura and Albarracín left Arica to form part of the constitutional troops of Castile within the vicinity of the vivanquistas of General Manuel de La Guarda.

On December 19, 1843, the Battle of Poconchile took place where the forces under the command of Gregorio Albarracín defeated Colonel Lobato's Vivanquistas, which allowed them to retake Arica.

On July 23, 1844, the Battle of Carmen Alto took place in Arequipa between troops commanded by Manuel Ignacio de Vivanco himself and the constitutionalists of Ramón Castilla.

Castilla declares himself liberal according to the new European currents that favored the abolition of slavery, the suspension of indigenous tribute and religious freedom.

But the war ended with the liberal triumph in the Battle of La Palma in Lima on January 5, 1855, where Rufino Echenique was defeated by Ramón Castilla.

In 1865, from Tacna he supported the revolution of Mariano Ignacio Prado against the government of Juan Antonio Pezet by signing the Vivanco–Pareja Treaty.

Albarracín participated in the Battle of Callao in the Chincha Islands War, after which he obtained the rank of "Graduate Colonel".

In 1876 with the new government of Mariano Ignacio Prado, Albarracín was appointed to a military post in Lima with the rank of "Graduate Colonel" until April 1879 when he returned to Tacna before the start of the War of the Pacific.

Once the Chilean landing was known, Rear Admiral Lizardo Montero sent Colonel Gregorio Albarracín in command of the Tacna Flankers to carry out reconnaissance and harassment actions against the Chilean troops, as reported in the diary of the Chilean soldier Alberto del Solar: However, the following data were known at the headquarters -and we even knew them-: the famous Albarracín, well mounted and with not inconsiderable cavalry forces, prowled around: his main objective was to destroy the elements that could be us of some use; his longing, luring us into ambushes and attacking us by surprise.

Albarracin then participates in the Battle of Alto de la Alianza, first capturing a Chilean advance that informs him about the enemy troops before the Battle in Quebrada Honda and later as commander of the Peruvian cavalry with the Hussar squadrons of Junín, Gendarmes de Tacna, Guides and Flankers of Tacna which is located on the right wing of Lizardo Montero.

Albarracin was then informed of the Chilean occupation of Tarata, so he decides to return to the Sierra de Tacna and together with Leoncio Prado and Juan Luis Pacheco de Céspedes participate in the Battle of Palca[1] on July 16, 1880, and the Battle of Tarata on July 21, 1880, where the Peruvian guerrillas were destroyed by the division of Orozimbo Barbosa.

In March 1881, the dictator Nicolás de Piérola appointed him subprefect of Huarochirí and in April carried out actions against Chilean forces in Chicla and San Bartolomé.