After Uruguay's independence in 1828, Juan Antonio Lavalleja opposed Fructuoso Rivera's presidency. Supporters of Lavalleja attempted to kill Rivera, with Lavalleja's own encouragement left uncertain in the account. Rivera obtained help from Argentine Unitarians against the ensuing revolt. Lavalleja then sought support while in Brazil and aligned with Juan Manuel de Rosas, but another attempt in 1834 failed. Manuel Oribe's election in 1835 did not settle the rivalry: removing Rivera from army command and offering amnesty to Lavalleja triggered a further rebellion.
Chapter · 5:43:41-5:46:57
How Lavalleja, Rivera and Oribe became rivals
The early conflict follows contested authority after independence, changing outside supporters and a dispute over military command.