Fight Like the Devil: The First Day at Gettysburg, July 1, 1863

“Do not bring on a general engagement,” Confederate General Robert E. Lee warned his commanders. The Army of Northern Virginia, slicing its way through south-central Pennsylvania, was too spread out, too vulnerable, for a full-scale engagement with its old nemesis, the Army of the Potomac. Too much was riding on this latest Confederate invasion of the North. Too much was at stake.

As Confederate forces groped their way through the mountain passes, a chance encounter with Federal cavalry on t...