The National Eagle Scout Association (NESA) is an organization of men who have earned the rank of Eagle Scout in the Boy Scouts of America. NESA's stated purpose is to, "to serve Eagle Scouts and, through them, the entire movement of Scouting." Eagle Scout is the highest rank attainable by a Scout in the Boy Scouts of America (BSA). ... The Boy Scouts of America (BSA) is an organization for boys between the ages of 7 and 18, and for both young men and women between the ages of 14 and 21, based in the United States of America, with some presence in other countries. ...

The origins of NESA are traced back to 1925 when an organization devoted to service and upholding the rank of Eagle was founded in San Fransisco. The organization was named, "the Knights of Dunamis," after the Greek word for 'spirit.' As time went on, many young men felt conflicts between the Knights of Dunamis, with their ceremonies, and their own Boy Scout Troop. In 1970, the Knights of Dunamis were merged into the Boy Scouts of America.