In 1914, as Germany mobilized for war, Chancellor Theobald von Bethmann-Hollweg remarked to the country’s legislators, “If the iron dice must roll, then God help us.” War has often been compared to a game of dice or a lottery. But just as frequently, war has been compared to a game of pure strategy like chess. Napoleon’s shocking successes during the early years of the Napoleonic Wars, for instance, are often attributed to strategic superiority and his ability to see the conflict in the same way...