Economy of Peru to respond to the sudden massive Chilean invasion. In Bolivia's capital La Paz top Bolivian authorities were outraged, and so announced that a state of war existed, thus invoking its 1873 secret military alliance treaty with Peru. Bolivia called on Lima to activate their secret mutual defense pact, while Chile waited for Peru to respond to Bolivia's demand and see if Peru declared its neutrality or not. However, Peru's Prado president and his top officials were warned by the Peruvian military that if Peru declared its neutrality, Chile will use this statement to convince Bolivia to jointly declare war on
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