Full Membership Eligibility Requirements, and examples of Revolutionary Patriots qualifying service, may be viewed on the "National NSDAR" website at http://www.dar.org.
Summary as follows:
Eligibility: "An applicant for membership must be no less than 18 years of age. She shall prove lineal blood line descent from an ancestor who aided in achieving American Independence. She must prove documentation for each statement of birth, marriage, and death."
Acceptable Service: "The National Society accepts service, with some exceptions, for the period between 19 April 1775 (Battle of Lexington) and 26 November 1783 (withdrawal of British Troops from New York)."
MEMBERSHIP INFORMATION REQUEST