The Grand Army of the Republic (GAR) was an organization of honorably discharged Union veterans of the American Civil War, who organized to promote the principles of “Fraternity, Charity and Loyalty.” Applicants for membership had to prove that they were honorably discharged veterans of the Union Army, Navy, Marine Corps, or Revenue Cutter Service (predecessor to the U.S. Coast Guard), who had served between April 1861 and April 1865.
The great majority of GAR records were maintained by the officers of the local GAR chapters (Posts). Many records were kept in the homes of key officers such as the Post Adjutant (secretary) and the Post Quartermaster (treasurer). Other records were stored at the post headquarters or were kept by the Post Commander. Because of this, the records for a particular Post may not all be archived at the same location.