1979 Greenlandic home rule referendum
A consultative referendum on home rule was held in Greenland on 17 January 1979. Just over 70% of voters voted in favour of greater autonomy from Denmark, leading to the establishment of a Greenlandic parliament and Greenland gaining sovereignty in areas such as education, health, fisheries and the environment.
Source: Wikipedia — 1979 Greenlandic home rule referendum (CC BY-SA 4.0)