The Chiloe Archipelago in southern Chile was historically one of the last royalist holdouts during the independence wars in South America, and was only conquered in 1826. In fact, Spain didn't recognize Chiloe as part of Chile until 1844. What it Spain kept the Chiloe archipelago in the peace settlement with Chile? Could it be used as a starting point for Spanish colonization of Patagonia? It would definitely be a sticking point with the Andean countries during the next decades, as it would make Spain seem intent on reconquering her former colonies.