This is an early-war excerpt from a passage regarding Camp Morton - initially where many Indiana regiments trained - later to become a prison camp.
Source:
Winslow, Hattie Lou, and Moore, Joseph R.H., Camp Morton 1861-1865: Indianapolis Prison Camp. Indianapolis, Indiana Historical Society, 1995. p.9
Soldier recreation was plentiful. Games brought from home included checkers, chess, and card games, and there was the usual "rough stuff" such as the Knights of Malta initiation - this meant being tossed on a piece of tent canvas handled by a squad of tormentors.
Source:
Winslow, Hattie Lou, and Moore, Joseph R.H., Camp Morton 1861-1865: Indianapolis Prison Camp. Indianapolis, Indiana Historical Society, 1995. p.9