8. Palmyra Atoll (Kingdom of Hawaii/Britain)
Palmyra Atoll was annexed by the Kingdom of Hawaii in 1862 and later claimed by Britain in 1889. Following the U.S. annexation of Hawaii in 1898, Palmyra became part of the U.S. territory. Its unique status as an incorporated U.S. territory has led to ongoing legal debate (britannica.com).
