He stated this in an interview with The Sydney Morning Herald.The head of Finland emphasized that the cost of Russia’s territorial "gains" in Ukraine is extremely high."Look, this year he advanced 0.25% of Ukraine’s territory, losing 167 soldiers for every kilometer. That is a very high price," he stressed.Stubb called Putin’s actions the biggest tactical and strategic mistake in modern history."I would say this is the biggest tactical and strategic mistake in modern history, because he set himself the goal of pacifying Ukraine; it will become a member of the European Union, and eventually NATO," the Finnish president added.Stubb also emphasized that the Russian invasion has only united the European Union and NATO."He set himself the goal of breaking up NATO. Well, he just doubled the border with NATO through Russia with Finland. He set himself the goal of destroying the transatlantic partnership. Now we are together increasing our defense spending to 5% (of GDP over 10 years, editor’s note)—a commitment agreed upon by all NATO members last month. He set himself the goal of breaking up the EU. But I have never seen it more united. So, Putin has failed by all measures."Hungarian Prime Minister Viktor Orbán voiced his hypothesis that most EU countries would vote against Ukraine’s accession to the bloc if "national referendums" were held on the issue, as was recently done in Hungary.