...gripping and unlikely story of the making of America’s elite Alpine fighting force Meet the men of the 10th Mountain Division. Their peacetime achievements are themselves remarkable: Five of them were on the United States ski team in the 1948 Olympics, and a sixth was their coach. All told, five dozen ski areas across North America ... “The Winter Army” comes at the same time as the republication of a rather different, and thoroughly engaging, volume on ski instruction in the military, the 1912 classic “Skis in the Art of War’’ (Northern Illinois, 246 pages, $37.95) by the Russian ski...