Which statements describe factors that led to the decline and defeat of the Aztec Empire? Choose all answers that are correct. A. The Aztecs had no strong leaders and limited military skills. B. Despite negotiations, the Spanish and the Aztecs went to war, though neither side wanted to. C. The Aztecs had never seen steel weapons or horses before. D. The Aztecs were friendly when the Spanish first arrived and brought them gifts. E. Peoples who had been conquered by the Aztecs joined the Spanish to help defeat them.