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What if a native state of similar power to the Incas formed in the east coast of the United States. controls all of California and Baja California and controls parts of Oregon. it has similar government and religious structures to the Inca and a similar tech level. essentially just imagine a second Inca Empire in Cali. how does this affect European colonial ambitions and US westward expansion? Will they remain uncontacted long enough to recover from the European plagues that would reach them via trade?