Often over-shadowed by contemporary events in China and Japan, the Chaco War (1932-1935) was a massive territorial war between Bolivia and Paraguay, which cost almost 100,000 lives. It was sparked by Bolivia's attempts to capture a stretch of the Paraguay River to gain access to the Atlantic. An old fashioned territorial dispute, the contested area was the Gran Chaco Boreal, a 100,000-square mile region of swamp, jungle and pampas with isolated fortified towns. The wilderness terrain made operations difficult and costly as the war see-sawed between the two sides. Bolivian troops, under the...