Over decades, Finland built its preparedness around the concept of “total defense” — a mobilizable population, civil resilience, shelters and a military designed to keep fighting with or without allies. The country can mobilize nearly 870,000 reservists out of a population of 5.6 million, a figure set to reach one million by 2031.
“It’s fair to say Finland is more ready to fight alone than other frontline countries. The U.S. wind-down doesn’t impact its readiness,” said Eoin Micheál McNamara, a postdoctoral fellow at the Finnish Institute of International Affairs.
Finland spends nearly 3 percent of its GDP on defense and, in line with its commitments to NATO, it intends to raise that figure to 5 percent by 2035. Its air force expects to receive U.S.-made F-35 fighter jets in the coming months. Like most European militaries, the Finnish armed forces are still catching up on drone warfare, but on land they have one of Europe’s largest artillery arsenals.
“Stalin called artillery the god of war,” said McNamara. “Unlike a lot of Western countries, Russia never forgot about artillery. Finns never forgot either.”
One of Finland’s greatest military assets is the land itself. An army invading from the east would have to move through a country of few roads, dense forests, deep snow and freezing temperatures, with little light in winter and almost none of the darkness that conceals movement in summer. In the woods, long, slender gray-white trunks stand so close together that it is impossible to see more than 50 meters ahead. In spring, when the leaves turn bright green, visibility drops even further.
Even without the U.S., it’s unlikely Finland would have to fight entirely on its own. Several European countries have an interest in keeping Russia off NATO’s northern flank, according to Charly Salonius-Pasternak of the Helsinki-based Nordic West Office think tank, referring specifically to Norway, Sweden and the U.K.
Still, Finland would face a Russian army with more manpower and a willingness to use sheer numbers in ways the alliance cannot easily match. “Since the Winter War, the very basics haven’t changed,” said Pitkäniitty, the border guard commander. “We have to be able to use the terrain, operate the environment better than anyone else — then, we have leverage,” he added. “Is the forest a typical Russian battle environment? I would say no. Their lessons are learned in more open environments.”
Finland is now trying to teach its NATO allies how to fight on that ground. In May, two multinational exercises in southeastern Finland — Northern Star 26 and Karelian Sword 26 — were designed in part to show troops from countries including France and the United Kingdom how to operate in Northern Europe’s forests, lakes and swamps. U.S. soldiers from the Virginia National Guard also took part.
Karelian Sword — conducted in Finland’s Vekaranjärvi region — involved some 10,000 soldiers in a simulated invasion of the country. One main takeaway from days of drilling in the woods was that armored vehicles and drones are ill-adapted for Finland’s forests. “It’s also very hard for commercial drones to find Finnish troops in the forest because of the leaves, unless you have a thermal camera,” according to Col. Ari Määttä, the Karelian brigade’s deputy commander who commanded the exercise.
The Karelian Sword exercise — conducted in Finland’s Vekaranjärvi region in May — revealed that armored vehicles and drones are ill-adapted for Finland’s forests. | Laura Kayali/POLITICO
The Nordic country is also preparing to add another obstacle. Alongside Poland and the three Baltic states, Helsinki withdrew last year from the Ottawa Convention banning anti-personnel landmines, arguing that Russia never joined the treaty and is already using the weapons in Ukraine.
Several Finnish military officers confirmed to the Global Reporters Network that the country’s defense forces plan to purchase anti-personnel landmines in the coming months. The mines would not be deployed in peacetime, they said, but would be available if the threat of a Russian invasion became more imminent.
“We have quite a long border with Russia,” said First Lt. Terra Tevajärvi, a 33-year-old reservist and trained mechanized infantry officer who works as a filmmaker. Standing in a clearing, with the sounds of gunshots in the distance, he added: “Landmines would help slow [an attacker] down and make our lives easier.”
‘Nuclear IQ’
There is one domain where geography, conscription and military readiness offer little protection: nuclear weapons. While Finland has practiced for a conventional defense for decades, it is only since it joined NATO three years ago that it has had to incorporate nuclear deterrence into its calculations.
Since joining the alliance, Helsinki has participated in its Nuclear Planning Group, taken part in nuclear exercises and begun rewriting laws that still reflected its long history outside the alliance. In June, Finnish lawmakers lifted restrictions on the transport and storage of nuclear weapons on Finnish territory, a legacy of its non-nuclear posture before NATO membership.
Changing that framework had proven more contentious than the discussion about joining NATO itself. Opposition parties resisted lifting the restrictions, while officials and analysts argued that Finland could not be a full participant in NATO defense planning without understanding how nuclear deterrence works. “Readiness in that regard is being learned,” said McNamara. “You hear the phrase: ‘Finland needs to upgrade its nuclear IQ as a society.’”
Finland’s nuclear debate highlighted an uncomfortable truth. While the country is better positioned than most frontline countries to defend its territory without American ground forces, it’s no more able than the rest of Europe to replace Washington’s nuclear umbrella.
While the U.S. has not publicly questioned that guarantee, the Trump administration’s unpredictability has pushed Helsinki and other European capitals to examine whether Europe can build a stronger deterrent of its own.
After meeting with France’s top general in the Finnish capital in June, the country’s Defense Minister Antti Häkkänen acknowledged talks with Paris about French President Emmanuel Macron’s proposal to broaden his country’s nuclear deterrent to include other European countries. The French president, who officially proposed the idea in March, has left what he means by it purposefully ambiguous. Paris has floated joint exercises and temporary deployments of nuclear-capable French fighter jets, but not a formal European nuclear guarantee. For Finland, it is still unclear what participation in the scheme would mean.
In the meantime, Helsinki is hoping that hosting troops from two nuclear-armed allies — France and the U.K. — will add another layer of deterrence, even if the force itself is conventional. Paris and London have expressed interest in participating in a NATO battalion that will be based in Sweden but operate in northern Finland. Designed to strengthen the alliance’s presence in the high north, the force will be led by Stockholm, another formerly neutral government that joined the military alliance after Moscow’s invasion of Ukraine.
“We’ll be on high alert, with high readiness to act,” said Col. Daniel Rydberg, who leads Sweden’s NATO mission in northern Finland. Along with Finnish border guards, NATO troops would be among the first responders if Russia decided to test Finland, he said in a phone interview the day before the force’s inauguration in June. “The message to Russia is deterrence,” he said.
Just what that would mean in the case of an attack by the Kremlin will depend on people like Nuutti Kurikka, a 20-year-old conscript whose great-grandfather fought in the Winter War.
Deep in the Finnish forest, Kurikka, a platoon leader, stood in front of a tank. The lesson of that war, he said, is “a mentality that we can overcome very hard things.”
Unlike officials in many European capitals, he is not anxious about the Trump administration’s ambiguity regarding NATO. “It’s not good that the relationship is a bit shaky, but Finland is prepared to defend itself alone if needed,” he said. “We did it before in the past.”
