
Ghostly in snow cloaks and gas masks, Finnish ski troops proved an adept and deadly adversary against Soviet invaders in the 1939-40 Winter War. (© Hulton-Deutsch Collection/CORBIS)
Ghostly in snow cloaks and gas masks, Finnish ski troops proved an adept and deadly adversary against Soviet invaders in the 1939-40 Winter War. (© Hulton-Deutsch Collection/CORBIS)