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: The United States Coast Guard was founded in 1915, but its roots go far back into American history. Other agencies preceded it or became a part of this consolidation: The Revenue Cutter Service, often called the Revenue-Marine, the Lighthouse Service, the Steamboat Inspection Service, the Bureau of Navigation, and the Lifesaving Service.