"A Soldier's Trial: An Episode of the Canteen Crusade" by Charles King is a novel written in the early 20th century. The story unfolds in a military setting after the Spanish-American War and centers on Colonel Ray, a seasoned officer facing disappointment in his army career and personal life. The narrative hints at themes of duty, morality, and the challenges of military life, particularly focusing on the influence of a controversial canteen that serves alcohol to soldiers—a point of contention in the community. The opening of the book introduces Colonel Ray, a soldier who has had a long and respected career, but is feeling disillusioned due to his lack of promotion and the mundane nature of his current assignments. As his family dynamics unfold, particularly with the arrival of his niece Priscilla, who has a strong missionary zeal against alcohol consumption, the stage is set for a clash of values regarding the moral responsibilities of military life. The tension surrounding the canteen and the experiences of Ray's son, Sandy, who returns from the war with emotional scars, serves as a backdrop for themes of personal struggle and societal expectations within the military community. (This is an automatically generated summary.)