Sergeant 'Horrible' Hanley is the main antagonist in the Book story Private Peacefull, and in the film. He is a cruel sergeant in World War One, who quickly despises Charlie and Tommo (The main characters of the story), and is feared and hated by all serving under him. He has Charlie court-martialed for cowardice after he disobeys a direct order so that he can stay with an injured Tommo, and has him shot by firing squad.
It is later found out that he was killed in a mine explosion, much to everyone's delight, but this does not change Charlie's guilty sentence and he is executed.
- Not Much is known about Hanley, apart from his cruel sense of heat and bad reputation.