Juan Lavalle retires to the Banda Oriental…

Juan Lavalle retires to the Banda Oriental (present Uruguay) after agreeing to the Convention of Barracas.

Juan Manuel de Rosas becomes governor of Buenos Aires.

Argentine lawyer Manuel Vicente Maza assumes an important role in Rosas' government.

Although born in Buenos Aires, Maza had finished his university studies in Law at the Universidad de Santiago in Chile.

As the independence movement from Spain grew in South America, Maza had been taken prisoner in Lima, by that time the center of the Viceroyalty of Peru, and had later spent time in jail in Buenos Aires.

Released in 1815, he had begun his political activity as head of the Civil Commission of Justice of Buenos Aires, bringing about the justice administration regulation named after him.

In 1816, he had served as mayor at the Buenos Aires Cabildo and in the following years, he developed a friendship and political relationship with Rosas.

During the 1820s, Maza has become widely involved in political activity.

He had been sent into exile for the first time in 1823 because of his participation in the uprising against Martín Rodríguez, and again in 1829 to Bahía Blanca for rising up against Lavalle.