elpfeife: My apologies, my earlier answer to your question was abrupt and impolite. The short answer is that it takes time to put an economy on a war footing. Then one must form armies from a very small peacetime cadre, ala WWI and WWII, then there is the time required to find the correct leaders who will follow the chosen strategy.
Lee was skilled and lucky, in that early on, after taking over from Johnston, he faced a number of Union Generals who thought the objective was Richmond. Thus he enjoyed the luxury of fighting a number of defense battles, at which he excelled and his lack of soldiers dictated. In front of Richmond even McClellan fought him to a standstill. Lee hadn't the support of competent subordinates when he decided to fight in an offensive manner. Many of his underlings worked hard after the war to write a defense of their actions or, lack thereof. Lee, held a civil tongue, did not write and was dedicated to healing the scars.
Lincoln couldn't find a general, until Grant, who understood Lee was to be Meade's only objective and that the Confederacy would collapse under a strategy which sapped the will of the South to fight, a war of attrition by attacking in a coordinated manner across a wide front. Many Confederate soldiers simply melted away from the armies until there really was nothing to fight with.
Grant was ably supported in his strategy. Poor old Jeff was saddled with a bunch of political generals, by and large, more intent on personal acclaim than fighting a defensive war, the only kind of war the South could have possibly won. And then, only if the Union had lost heart. Davis couldn't adapt, he couldn't turn aside from old friends and he couldn't get his young country to act as one entity. That damned old bugaboo of "states rights" simply put him in a straitjacket. He couldn't wage war with so many enemies inside his country, governors, generals, his cabinet, etc.
Davis had his Beauregard, the other Johnston (Albert), the Johnston (Joseph), Longstreet (who failed Lee at Gettysburg), Bragg, Polk, and the list goes on. Lincoln had Freemont, McClellan, Hooker, Burnside, and others. Lincoln discarded the useless when politics permitted, reassigned others to unimportant positions. Davis tended to keep his failures close at hand and use them over and over. His loyalty was a negative in many cases.
Please, do not take anything I write to impugn the bravery and fighting ability of the individual soldier in either blue, butternut brown or gray. The Confederate armies were out-fought. There were enough bodies on both sides to attest to the fighting ability of the individual soldier.