Complex sentence: Aleixo García was the first European to cross the Chaco and even managed to penetrate the outer defenses of the Inca Empire on the hills of the Andes, in present-day Bolivia, accomplishing this eight years before Francisco Pizarro.
Split into simpler sentences: Aleixo García was the first European to cross the Chaco and even managed to penetrate the outer defenses of the Inca Empire on the hills of the Andes, in present-day Bolivia. He was the first European to do so, accomplishing this eight years before Francisco Pizarro.