Lead: For 400 years service men and women have fought to carve out and defend freedom and the civilization we know as America. This series on A Moment in Time is devoted to the memory of those warriors, whose sacrifice gave, in the words of Lincoln at Gettysburg, the last full measure.

Content: In early July 1863 the contending forces of Union and Confederate converged on the small Pennsylvania town of Gettysburg. It was Gen. Robert E. Lee's second invasion of the North. He was trying to get between the Army of the Potomac and Washington and bring the war to an end. On July 1st alert Union cavalry units began to gather and blocked his path thus starting the decisive three-day battle that would decide the Civil War.