Question: The Battle of San Roque was part of the Argentine Civil War, the Federalist forces of Córdoba Province governor Juan Bautista Bustos were defeated by which forces of General José María Paz, who were the proponents of the concept of a unitary state (centralized government) in Buenos Aires during the civil wars? 

The Decembrist revolution (Spanish: "Revolución decembrina" ) was a military coup in the Buenos Aires Province, Argentina.  Juan Lavalle, returning with the troops that fought in the Argentine-Brazilian War, made a coup on December 1, 1828, deposed the governor Manuel Dorrego and closed the legislature.  Dorrego was captured and executed a short time afterwards.  The rancher Juan Manuel de Rosas organized militias that fought against Lavalle and removed him from power, restoring the legislature.  However, as the coup had reignited the Argentine Civil Wars, Rosas was appointed governor of the Buenos Aires province to wage the war against the Unitarian League.  José María Paz made from Córdoba a league of provinces, and so did Rosas.  The conflict ended a short time after the unexpected capture of Paz, who mistook enemy troops for his own. <SEP> The Battle of San Roque was part of the Argentine Civil War.  It was fought on the Primero River, near the city of Córdoba, Argentina, on 22 April 1829.  As a result of his victory, Paz assumed the office of provincial Governor.  The Federalist forces of Córdoba Province governor Juan Bautista Bustos were defeated by the Unitarian forces of General José María Paz. <SEP> José Miguel Carrera Verdugo (October 15, 1785 – September 4, 1821) was a Chilean general, member of the prominent Carrera family, and considered one of the founders of independent Chile.  Carrera was the most important leader of the Chilean War of Independence during the period of the Patria Vieja ("Old Republic").  After the Spanish Reconquista ("Reconquest"), he continued campaigning from exile.  His opposition to the leaders of independent Argentina and Chile San Martin and O'Higgins respectively made him to live in exile in Montevideo.  From Montevideo Carrera traveled to Argentina where he joined the struggle against the unitarians.  Carreras small army was eventually left isolated in the Province of Buenos Aires from the other federalist forces.  In this difficult situation Carrera decided to cross to native-controlled lands all the way to Chile to once for all overthrow Chilean Supreme Director O'Higgins.  His passage to Chile, which was his ultimate goal, was opposed by Argentine politicians and he engaged together with indigenous tribes, among the Ranquels, in a campaign against the southern provinces of Argentina.  After the downfall of Carreras ally, the Republic of Entre Ríos, and several victories against the United Provinces of the Río de la Plata Carrera's men were finally defeated by numerically superior forces near Mendoza.  Carrera was then betrayed by one of his Argentine helpers, leading to his capture and execution in that city.  José Miguel Carrera was of Basque descent. <SEP> Unitarianists or Unitarians (in Spanish, "Unitarios") were the proponents of the concept of a unitary state (centralized government) in Buenos Aires during the civil wars which shortly followed the Declaration of Independence of Argentina in 1816.  They were opposed to the Argentine Federalists, who wanted a federation of independent provinces.  (Argentine Unitarianism was an ideologic grouping, not a religious one, and it is unrelated to religious Unitarianism.)