Spain kept a claim on its former Spanish West Florida territory in what would become the coastal counties until the Adams–Onís Treaty officially ceded it to the United States in 1819.
spˈeɪn kˈɛpt ɐ klˈeɪm ˌɔn ɪts fˈɔːɹmɚ spˈænɪʃ wˈɛst flˈɔːɹɪdə tˈɛɹɪtˌoːɹi ɪn wʌt wʊd bɪkˌʌm ðə kˈoʊstəl kˈaʊntiz ʌntˈɪl ðɪ ˈædəmz ˈɑːnɪs tɹˈiːɾi əfˈɪʃəli sˈiːdᵻd ɪt tə ðə juːnˈaɪɾᵻd stˈeɪts ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd nˈaɪntiːn.