VOLYN REGION, Ukraine — In a thick pine forest in western Ukraine, not far from the border with the Kremlin-aligned nation of Belarus, a military engineer named Anton is supervising a vast underground construction site.
"It's a bunker," says Anton, who, like the other soldiers in this story, declined to give his last name for security reasons. "We shipped in most of the wood because we didn't want to cut the trees here. We need them for cover."
