What If?

You get up and go to telegraph Davis.
"Hello President Davis this is Colonel General Robert E. Lee speaking" you say
"What's up Lee." says Davis
"I have a plan to end the war, sir. We attack in their land. Using the Shenandoah Valley as cover, we can make our way up and hit them where it hurts."
"hmm" says Davis. "Who's 'we'?"
"My army. We would gather resources in Northern Virginia and go from there." you say
"Okay. I approve, Lee"