This is the flag of the "Warren Light Artillery Battery" (also called "Swett's Battery"). Major Charles Swett of Warren County, Mississippi led the "Warren Light Artillery Battery" into battle at Farmington, Shiloh, Chickamauga, and 16 other campaigns.

http://www.genealogy.com/users/s/w/e/Mike-Sweet-/PHOTO/0011photo.html

Also, to read Civil War memoirs of Major Charles Swett called "A Brief Narrative of Warren Light Artillery" go to

http://www.genealogy.com/users/s/w/e/Mike-Sweet-/FILE/0010page.html

Also, to view photos of Charles and read more about Charles in "Swetts of Mississippi", go to

http://www.genealogy.com/users/s/w/e/Mike-Sweet-/