Question of Courage

This engrossing SF short story is set in the distant future, but it deals with an issue that has plagued warriors for thousands of years -- the distressing specter of a commander who would rather save his own neck than risk taking his troops into the midst of a heated battle. Can the newly arrived Lieutenant Marsden remedy the situation and bring out some bravery in the lily-livered commander, 'Cautious' Charley Chase?