temperatures. Argentine troops suffered from cold-wet conditions, holding positions in the 1982 Falklands War. The Siachen conflict is a military confrontation between India and Pakistan over the disputed Siachen Glacier region in Kashmir. The conflict began in 1984 with India's successful Operation Meghdoot during which it gained control over all of the Siachen Glacier. A cease-fire went into effect in 2003. Historical lessons learned Paton offered a 2001 overview of human factors pertaining to cold in military operations. The understanding of cold injuries evolved in the 19th and 20th centuries; understanding of the causes and treatment of frostbite and trench foot improved. In the Sino-Japanese War, the Japanese learned the importance of foot care, keeping feet dry and warm with replacement socks. In World War I, doctors realized that trench foot was a prolonged exposure to cold, wet conditions on the feet, which were exacerbated by the use of tight puttees, bandage-like leg wrappings. The Soviet invasion of Finland during the Winter War showed the power of asymmetric warfare on the Finnish side, where small units were able to cut the road-bound Soviet invading troops into segments, like firewood, and vanquish each segment. The small units arrived silently on skis or with light artillery pulled by reindeer over frozen, untracked terrain, using winter conditions as an advantage. Although the Soviet Union gained territory from the Finns, it was at the cost of 200,000 fatalities against 25,000 on the Finnish side. The German invasion of the Soviet Union induced more than 250,000 cold injuries in one year. The French Army occupying the Maginot Line experienced 12,000 cold injuries. Experiences from the disastrous 1941 German advance on Moscow in winter conditions led to the 1942 Taschenbuch für den Winterkrieg ("Pocket book for Winter War"), which highlighted ideal approaches to handling winter, but acknowledged that improvisation in the field would be necessary when supplies were lacking. The Soviet troops in that period had felt-lined boots and quilted uniforms, but the Germans continued fighting in their summer uniforms. German handbook The Taschenbuch für den Winterkrieg manual contains sections on the influence and duration of winter, the seasons of mud and thaw, preparation for winter warfare, winter combat methods and maintaining morale, including the use of reading material, lectures, movies, and "strength through joy" exercises. Other sections cover marches, the maintenance of roads, winter bivouacs and shelter, construction of winter positions, camouflage and concealment, identification