General Robert E. Lee: he had many victories in previous battles and participated in the Peninsula Campaign, the Battle of Richmond, and the Second Battle of Bull Run.
George G. Meade: the successor of Major General Joseph Hooker ( a general who was commander of the army at Potomac but who was then replaced due to a defeat). He was still to new to his command since he was appointed only 3 days before the battle. This battle was his greatest victory and mistake.
1st day: cavalry under Gen. Buford slowed Confederate advance until infantry arrived; more confederate reinforcements arrived
2nd Day: Union defended hill south of Gettysburg, Lee launched a heavy assualt on the Union left flank; fierce fighting ; Confederates gained ground; Union defenders held strong positions
3rd Day: fighting resumed at Culp's hill; cavalry battles in east and south; and most importantly a dramtic infantry assault occured on the center of the union line on Cemetary Ridge; Lee's army retreated after lots of firing on them and great losses