"Herbert Rosinski concluded that Moltke was the man who applied Clausewitz's pure theory to the sphere of practical action. Waldemar Erfurth, an important German military writer and general in the Second World War, argued that Moltke freed the Prussian General Staff from Jomini's theories, led it into the intellectual world of Clausewitz, Scharnhorst, and Gneisenau, and developed Clausewitz's operational teachings in light of nineteenth-century developments."