CIVIL WAR used 1862 Casey's INFANTRY TACTICS Volume 3, 1st Edition Military G
Silas Casey wrote this handbook series for Officers in the Civil War (Union) it appears to be all there & only 1 "foldout" is ripped! The front of the pages has the name I. Davis inscribed (see pic), the back flap has a note written... "This will be my book"...
Didn't find an exact match for Davis in history, but im guessing he would have had to have been an Officer. Nice PIECE OF AMERICANA HISTORY (at our darkest hour) ENJOY.