Army - 6th Cavalry Regiment Veteran w Cav Branch V1 Classic T ShirtSolid colored t shirts are 100% combed ringspun cotton, however, heathered colors could contain a cotton polyester blend Preshrunk to minimize shrinkage Double needle sleeve and bottom hems. The 6th Cavalry ("Fighting Sixth'") is a regiment of the United States Army that began as a regiment of cavalry in the American Civil War. It currently is organized into aviation squadrons that are assigned to several different combat aviation brigades.