Failed southern strategiesAccording to the Powell Doctrine, before the United States undertakes a military action abroad, there must be a clearly defined national purpose supported by the polity and a precise military strategy to accomplish that purpose, no more and no less. Lincoln was reported to have said of McClellan in the fall of 1861, "I will hold McClellan's horse if he will only bring us success." Because of dyspepsia and neuralgia that worsened under wartime pressures and left him virtually blind in one eye, Davis was wracked by pain that exacerbated his waspish temper.