A dispute in 2370 over a colony of Native American descent on Dorvan V, a planet handed to the Cardassians by treaty, whose settlers refused to be moved by Starfleet.
The Dorvan V relocation dispute is the main story of the Next Generation episode Journey's End. The new border agreed with the Cardassian Union leaves several Federation colonies on the wrong side, and Admiral Nechayev orders Picard to remove the people of Dorvan V, by force if he has to.
The colonists searched for two centuries for a home that suited them and have lived on Dorvan V for twenty years. Their leader Anthwara will not leave, and he tells Picard that one of his ancestors took part in the suppression of the Pueblo Revolt. Cardassian troops under Gul Evek arrive early, and Wesley Crusher, on leave from the Academy, warns the villagers of the planned removal.
Fighting is avoided when the colonists agree to give up Federation citizenship and stay under Cardassian rule. Wesley leaves Starfleet to travel with the Traveler.