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As the title states what would be a plausible POD for Aragon to have a colonial empire in the new world (doesn't have to be huge just a decent presence, Peru for gold may be a possibility)? They would need a Atlantic port (Navarre is a good choice) and the marriage of Isabella & Ferdinand would need to be prevented as well. POD should be in the 15th century if possible and you can delay the opening of the new world if that helps. Comments much appreciated!