USA Sunny Pt & NS Kellum branch

does anyone know what customers are served by the U.S. Army line that runs from Malmo, North Carolina to Wilmington, North Carolina and down to Marine Ocean Terminal at Sunny Point, North Carolina and Norfolk Southern’s Kellum-Marine Junction-Camp Le Jeune Yard branch. I heard that the USA line serves a few industries besides the ocean terminal. And does NS maintain its branch to Kellum for benefit of Camp Le Jeune marine base?