The Washington PostDemocracy Dies in Darkness

Finland joins NATO, doubling alliance’s land border with Russia

Updated April 4, 2023 at 12:28 p.m. EDT|Published April 4, 2023 at 3:59 a.m. EDT
Military personnel prepare to raise Finland's flag during a ceremony Tuesday at NATO headquarters in Brussels. (Geert Vanden Wijngaert/AP)
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BRUSSELS — Finland formally joined the North Atlantic Treaty Organization on Tuesday, a historic shift for a country that once insisted it was safer outside the military alliance and a sign of how Russian President Vladimir Putin’s gamble in Ukraine is upending the post-Cold War order.

Finnish membership will double NATO’s land border with Russia, adding more than 800 miles. It will also bolster the alliance’s presence around the Baltic Sea and enhance its position in the Arctic.