George Gordon Meade could hardly believe it: only three days earlier, he had been thrust unexpectedly into command of the Army of the Potomac, which was cautiously stalking its long-time foe, the Army of Northern Virginia, as it launched a bold invasion northward. Meade had hardly wrapped his head around the situation before everything exploded. Outside the small college town of Gettysburg, Confederates had inexplicably turned on the lead elements of Meade's army and attacked. The first day of b