Military and Bolivian politician born in Potosi in 1791 and died in La Paz in 1872. Joined the troops of Simón Bolívar from the movements of emancipation of America's first rales, peeling with him at the battle of Junín, August 6, 1824, and in the battle of Ayacucho on December 9 of the same year. After that, Sebastián Ágreda became one of support firmer which was elected President of the Republic, Marshal Andrés Santa Cruz, as it could be verified in 1828, when at the time of the invasion of Bolivia by Peruvian troops, under the command of the general Agustín Gamarra, Ágreda defended stronghold of Oruro so it does not fall into invading hands. After the provisional Governments and the final implementation of Santa Cruz as the Bolivian President, Ágreda was promoted to the rank of Lieutenant Colonel and went on to have remote control effective in the campaign of Peru (1834), to give the Bolivian Vice-President, Mariano Enrique Calvo, the post of Minister of war. The merits of Ágreda were also warned by the successor of Santa Cruz, the general José Miguel Velasco, who, after the triumph of his coup d ' état (1839), Ágreda awarded the rank of general of Brigade.
Despite this, the reluctance of the new general with regard to the intentions of Velasco were many. For this reason, when in 1840 took shape the new attempt of boliviano-peruana Confederation, and the consequent invasion of the generals Gamarra and Ballivián, a faction of the Bolivian army remained faithful to the idea of returning to Santa Cruz as President. In June of 1841 Velasco was away from power by the victories of Gamarra and Ballivián, so Ágreda and the former Vice-President, Mariano Enrique Calvo, led a brief Government akin to Santa Cruz, between July and September of the same year. But these attempts at friendly Santa Cruz Ballivián victory at the battle of Ingavi, on November 18, 1841, ended. New President Ballivián, tried to keep his side at Ágreda, naming him general of division in 1850, but it withdrew from active politics, not only during the Ballivián Government, but also during the of José María Linares (1857-1861).
However, Ágreda Yes took part in the insurrection of general José María de Achá, who ended, through a coup d ' état, the Government of Linares in 1861. The new President named Sebastián Ágreda Minister of war in 1864, in a desperate attempt to remain in power after another general, Mariano Melgarejo, acosase to the President after demonstrating the rigging of the elections of 1862. Last political participation of Ágreda took place in 1865, when he/she was defeated in the elections for the Presidency of the Republic that ultimately awarded to Melgarejo power that had already obtained months earlier by the new coup d ' état that overthrew José María de Achá. Since then, Sebastián Ágreda withdrew from active politics until his death, occurred in La Paz in 1872.