Snape seemed to be facing a constant, low level of mutiny from a hard core of students.
There are no more uses of "mutiny" in the book.
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The tank battalion’s mutiny was put down; though some of the leaders escaped.
The largest mutiny in modern military history occurred during the first world war when an estimated 40,000 French soldiers, probably wisely, ignored the command to advance on German troops entrenched in hilltop positions.