The Second Schleswig War (1864), the political origins of which lay in Denmark's conflict with Prussia and Austria over the Schleswig-Holstein Question, vindicated Moltke's concepts of operations and led to an overhaul of the command arrangements of the Prussian Army. Moltke envisaged a rapid attack to prevent the Danes falling back behind water obstacles which the Prussian Navy could not overcome. A rigid system of seniority placed Friedrich Graf von Wrangel, widely regarded as being in his dotage, in command. He ignored all of Moltke's directives and his own staff's advice, and by allowing the Danish Army to withdraw at its leisure he prolonged the war for several months. The resulting "post mortem" was to ensure a better (though not infallible) system for appointing commanders.