Tennessee and Georgia have been in a somewhat long-running dispute over a surveying error with their shared border. Georgia seems to be particularly interested in the water in the Tennessee River, which would flow through GA if the border were moved. This has led to some humorous moments, e.g. "[i]n 2008, former Chattanooga Mayor Ron Littlefield sent an aide, who reportedly wore a coonskin cap, and a city councilman to Atlanta with a truckload of bottled water during a previous chapter of the dispute."[0]

0 - One of the more recent articles about this hullabaloo: http://www.timesfreepress.com/news/local/story/2017/feb/26/f...