|Vice President of Argentina|
October 12, 1862 – January 2, 1868
|Preceded by||Juan Esteban Pedernera|
|Succeeded by||Adolfo Alsina|
|Acting President of Argentina|
June 12, 1865 – January 2, 1868
San Miguel de Tucumán
|Died||January 2, 1868 (aged 54–55)|
|Relations||Agustina Paz de Roca(Sister)|
Alejo Julio Argentino Roca(Nephew)
Marcos Paz was born to a prominent Tucuman family in 1813. His father was Juan Bautista Paz, a lawyer and legislator who served as deputy governor of the province several times, and his brother was General Gregorio Paz. He earned a law degree in 1834. He married the former Micaela Cascallares, daughter of a wealthy landowner, and settled with her in Buenos Aires.
After the fall of Juan Manuel de Rosas in 1852 he joined Justo José de Urquiza in his fight against Bartolomé Mitre's forces in Buenos Aires, and joined Col. Hilario Lagos as an adjutant; the siege was ultimately unsuccessful.
Elected Governor of Tucumán in 1858, Paz took part in the San José de Flores Pact of 1859, which helped secure national unity, and was elected to the 1860 convention that produced the first amendments to the Constitution of Argentina. He then assisted Gen. Wesceslao Paunero, who was sent as an envoy by Mitre to other provincial leaders, and served briefly in his stead as Governor of Córdoba, from December 1861 to March 1862.
An erstwhile foe, Buenos Aires leader Bartolomé Mitre, befriended Paz during earlier negotiations, and nominated him as running mate for the 1862 elections. Mitre had obtained significant concessions for Buenos Aires following his victory at the Battle of Pavón in 1861, and the choice of Paz, who as a supporter of the Argentine Confederation would have otherwise be an opponent, was part of Mitre's bid to placate separatist sentiment outside Buenos Aires Province. The duo won unanimously in the electoral college, and Paz became Vice-President of Argentina.
When Mitre was away commanding the allied forces during the Paraguayan War, Paz fulfilled the role of acting president. He died in office on January 2, 1868, in Buenos Aires, as a victim of a Cholera epidemic, and Mitre had to return to Argentina to resume his position as president.
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Felix de la Peña
| Governor of Córdoba
1861 - 1862
Juan Esteban Pedernera
| Vice President of Argentina