Flag of Peru which joined Bolivia to form the Peru–Bolivian Confederation. The South was formed first, thus adopting a new flag: a red vertical band on the left, with a golden sun and four small stars above (representing Arequipa, Ayacucho, Cuzco and Puno, the four groups of the republic), and the right side divided into an upper green band and a lower white one. The North kept the currency and all ---- of the dissolved Peru, including its flag. The flag of the Peru-Bolivian Confederation showed the coats of arms of Bolivia, South and North Peru, from left to right and slanted at
Brazil–Peru border infrastructure, cooperation (mainly in social and security issues), border integration and economic-trade integration. In the field of physical integration, once the Interoceanic Highway, which connects the State of Acre with the Pacific and inaugurated in 2011, the two countries started to study a Bioceanic Railroad project, object of a Brazil-Peru-China Memorandum of Understanding signed In May 2015. These projects are strategic for the integration of the economies of the North and the Midwest of Brazil to Peru and the Pacific. Brazil–Peru border The Brazil–Peru border is the line, located in the Amazon Rainforest, that limits the territories of Brazil and