An unofficial referendum on integration into Sweden was held in Åland in June 1919.

[1] The referendum was organised by the Lagting and approved by a vote on 1 June.

[1] It took the form of a petition in which voters could sign in yes or no columns.

[1] Although the proposal was approved by 96% of voters, the islands remained under Finnish control following a decision by the League of Nations in 1921.

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