You’re driving down a dirt road near the village of Misa, Latvia, roughly 32 miles south east of Riga, when suddenly a dozen youngsters emerge from the woods. They’re dressed in military garb, and their faces are painted green and brown; they wear tree branches around their heads and arms—camouflage. They’ve just finished a training simulation: liberating a hostage from enemy soldiers. They are members of the Youth Guard, a section of Latvia’s National Guard. With its more than 8,000 volunteers, it is the country’s largest paramilitary group.