11/ Georgia, GA
There is a border dispute at the Georgia-Tennessee boundary. Georgia claims parts of the Tennessee River after mistakes were made when surveying the region in the 19th Century.
Over 200 years have passed but it remains a βhotβ topic due to the rapidly increasing and drier weather in the region, which has led to water shortages and limitations.
https://en.wikipedia.org/wiki/Tennessee%E2%80%93Georgia_water_dispute
12/ Hawaii, HI
Hawaii changed political form several times before becoming the 50thβand newestβU.S. state on August 21, 1959! πΊ It was an independent kingdom from 1795 until 1893, then became a republic (1894-1898), followed by U.S. territory status (1898-1959), and finally, statehood.
https://en.wikipedia.org/wiki/Hawaiian_Kingdom