The Peru–Bolivian Confederation (or Confederacy) was a short-lived confederate state that existed in South America between 1836 and 1839. Its first and only head of state, titled “Supreme Protector”, was the Bolivian president, Marshal Andrés de Santa Cruz.
The confederation was a loose union between the states of Peru (by this time divided into a Republic of North Peru and a Republic of South Peru, which included the capital Tacna) and Bolivia. Since its inception, the confederation was seen as threat by influential politicians in the neighboring countries, and its support for Chilean and Argentine dissidents in exile caused Argentina and Chile to wage war separately against the confederation. The confederation collapsed after being defeated by a combined Chilean and Peruvian dissident force in what is now known as the War of the Confederation.
Read more about Peru–Bolivian Confederation: Background, Formation, Structure of The Confederation, Conflicts and The International Situation, Chilean Invasion and Dissolution