Civil War games were common on both sides during the war. Games did a lot to keep the troops entertained and ease the constant boredom of camp life.
Soldiers played all kinds of card games, chess and checkers, backgammon, dominoes, they read newspapers and books, played horseshoes, and they also played whole team sports such as baseball and a very early often-brutal version of football.
TO THE RIGHT----> Cards used by Union soldiers during the war
Holidays in camp were cause for large celebrations. There were foot races, feasts, horse races, music shows, and all types of different contests that were put on by the troops.
Basically soldiers on both sides did anything they could to stop the boredom they often had to endure living in camp.
Now of course all of these activities could never take place when an army was on an active campaign, during a campaign leisure time was relegated to basically writing letters, sleeping and keeping your equipment in working order.