The Auxiliary to Sons of Union Veterans of the Civil War (ASUVCW) is a patriotic and educational organization, which strives to assist the Sons of Union Veterans of the Civil War (SUVCW) in keeping alive the memories of our ancestors and their sacrifices for the maintenance of the Union; to aid in caring for helpless and disabled veterans; and to properly observe Memorial Day.

Dr. Mary E. Walker Auxiliary No. 52, ASUVCW was chartered by National President Danielle Michaels on March 20, 2004, with rank from August 9, 2003. It is the official Auxiliary to the Phil Sheridan Camp No. 4. The Auxiliary was named for Civil War surgeon Dr. Mary E. Walker (1832-1919). The number “52” was chosen to honor the 52nd Ohio Infantry, to which unit Dr. Walker was attached..