The Grand Army of the Republic (GAR) was an organization of Civil War veterans of the Union Army, Union Navy, Marines, and the U.S. Revenue Cutter Service. Its advocacy work included lobbying Congress for pension benefits and supporting suffrage for African American veterans.
For a complete list of GAR posts nationwide see “The Grand Army of the Republic and Kindred Societies: A Guide to Resources in the General Collections of the Library of Congress … Appendix: List of posts and by location by department.”
The General Frederick W. Lander Post No. 5, Grand Army of the Republic in Lynn, Massachusetts was built by “members of the GAR as a memorial to the Union Army veterans of the Civil War.”