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 devotion gave, in the words of Lincoln at Gettysburg, the last full measure. Intro.: A Moment in Time with Dan Roberts. Content: George Henry Sharpe, head of the Bureau of Military Intelligence, through the systematic assembly and analysis of data from multiple sources, provided Union commanders their eyes and a substantial edge in the last two years of the Civil War. Loading... Taking too long? Reload document | Open in new tab Download Share