With Finland’s membership, Nato now has one of Europe’s most powerful armies

Its standing forces of around 19,000 can quickly grow to 280,000

Finland’s President Sauli Niinisto and Nato secretary-general Jens Stoltenberg. Photo: Geert Vanden Wijngaert/AP

Matthew DayTelegraph Media Group Limited

Finland formally became the 31st member of Nato this week, ending decades of non-alignment to join the military alliance in the wake of Russia’s invasion of Ukraine.