Finland became NATO’s newest member on 4 April 2023, upon depositing its instrument of accession to the North Atlantic Treaty with the United States at NATO Headquarters in Brussels. NATO Allies signed Finland’s Accession Protocol on 5 July 2022, after which all 30 national parliaments voted to ratify the country’s membership.
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| The Finnish flag (blue cross on white background) has been added to the 30 previous ones (Picture source: NATO) |
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