Finland shares an 833-mile border with an aggressive and unpredictable neighbor. That proximity led to a major conflict during World War II—the horrific Winter War—and even now it keeps Finns nervous about Russia’s intentions. David Wolman suited up to train with the elite soldiers who will be on the front lines if this cold feud ever gets hot.

Finland shares an 833-mile border with an aggressive and unpredictable neighbor. That proximity led to a major conflict during World War II—the horrific Winter War—and even now it keeps Finns nervous about Russia’s intentions. David Wolman suited up to train with the elite soldiers who will be on the front lines if this cold feud ever gets hot.