Treaty of Defensive Alliance (Bolivia–Peru) Treaty of Defensive Alliance (Bolivia–Peru) The Treaty of Defensive Alliance was a secret defense pact between the South American countries of Bolivia and Peru signed in the Peruvian capital of Lima on February 6, 1873. The document was composed of eleven central articles, outlining its necessity and stipulations, and one additional article that ordered to keep the treaty secret until it was deemed necessary by both contracting parties. The signatory states were represented by the Peruvian Minister of Foreign Affairs, José de la Riva-Agüero y Looz Corswaren, and the Bolivian Envoy Extraordinary and Minister Plenipotentiary in Peru, Juan de la
Trujillo, Peru and others. The Chimu culture built its primary settlement at what is known as Chan Chan, which was the capital, having an estimated 100,000 people at its peak. It is the largest pre-Columbian city built of adobe and has been designated a UNESCO World Heritage Site. Its remains are northwest of the current city center. The present Spanish–Peruvian city of Trujillo was founded in an ancestral territory populated by ancient indigenous civilizations. The Spanish founded new cities expressing their culture in what they called the "Viceroyalty of Peru". The Moche civilization flourished in northern Peru with its Huacas del Sol