Last summer Cincinnati Opera presented Silent Night, a retelling of the 1914 “Christmas Truce,” when World War I forces set aside their battles and marked the holiday. Local playwright Phil Paradis has rendered this story into a play that is being presented for the holidays. Two soldiers — one British, the other German — meet by chance as they seek warmth for their respective trenches. They are wary but realize their true enemy is the cold. “In the midst of war, it gradually dawned on British and German soldiers that their similarities were greater than their differences,” Paradis says.