- "When the Walkers come crawling Craster will serve us up like so many pigs. If we want to live, we'll have to look out for ourselves."
The Mutineers of the Night's Watch are the sworn brothers of the Night's Watch who mutiny against a Lord Commander, usually breaking their vows in the process. To date, there are only two currently known mutinies that have ever taken place: the Mutiny at Craster's Keep and the Mutiny at Castle Black.
The Mutiny at Craster's Keep occured in 300 AC at Craster's Keep after massacre at the Battle of the Fist of the First Men when several sworn brothers of the Night's Watch broke their vows and carried out a mutiny against the Lord Commander Jeor Mormont after taking shelter at Craster's Keep, killing the Lord Commander and taking over Craster's Keep in the process.
Following the mutiny, Mutineer Karl Tanner takes command of the Mutineers and they remain at the keep. Back at Castle Black however, Night's Watchmen Jon Snow proposes that they must be killed so that they will not divulge any information about Castle Black to Mance Rayder. All of the mutineers are slain when a loyal group of Night's Watchmen led by Jon Snow launch a raid on Craster's Keep.
The Mutiny at Castle Black occured at Castle Black in 302 AC after the Evacuation of Hardhome when several disgruntled Night's Watchmen, led by First Ranger Alister Thorne, murdered the Lord Commader, Jon Snow, and attempted to take over the Castle. However, the wildlings under Chieftian Tormund and the loyal Night's Watchmen later defeated the mutineers with the resurrected Lord Commander personally executing the ringleaders. including Alliser Thorne himself. The Mutiny at Castle Black, unlike the earlier Mutiny at Craster's Keep was a plot to overthrow the current Lord Commander at the time (Jon Snow) and toreplace him with another (Alliser Thorne), in comparison to the goals of the mutineers at Craster's Keep who wanted to create their own utopia, away from the hardships of serving in the Night's Watch.
- Karl Tanner, a former Night's Watchman, who participated in the Mutiny at Craster's Keep. Considered to be the leader of the mutineers at Craster's Keep. Killed by Night's Watchman Jon Snow in the Raid on Craster's Keep.
- Rast, a former Night's Watchmen, who participated in the Mutiny at Craster's Keep. Killed by Ghost in the Raid on Craster's Keep.
- Alliser Thorne, the First Ranger of the Night's Watch, attempted to overthrow the current Lord Commander at the time, Jon Snow, in the Mutiny at Castle Black. He was the main mastermind behind the mutiny. Initially successful, the mutineers were later defeated by the wildlings and the remainder of the Night's Watch loyalists. Later executed by the resurrected Lord Commander.
- Othell Yarwyck, the First Builder of the Night's Watch, was one of the masterminds behind the Mutiny at Castle Black. Later defeated and executed by the resurrected Lord Commander.
- Bowen Marsh, the First Steward of the Night's Watch, was one of the masterminds behind the Mutiny at Castle Black. Later defeated and executed by the resurrected Lord Commander.
- Olly, the personal steward and trusted student of the Lord Commander, who participated in the Mutiny at Castle Black and was one of the mutineers who personally murdered the Lord Commander. Later defeated by the loyalist-wildling forces, he was remorsefully executed by the resurrected Lord Commander.
In the books
In the A Song of Ice and Fire novels, the "Betrayers" - as they are called in the Appendix to A Dance with Dragons - are led by Dirk and Ollo Lophand, who kill Craster and Lord Commander Mormont, respectively. Rast isn't present because he had remained at Castle Black. Grenn and about dozen more remain loyal to Mormont, and they are outnumbered 1:2 by the Betrayers, hence the Betrayers are at least twenty.
The Betrayers who are specifically mentioned in the books are:
Some of these mutinous black brothers had been involved in a conspiracy to kill Lord Commander Mormont and several other members of the Night's Watch to ensure the end of the Great Ranging and facilitate their desertion. However, the sudden snowfall and the attack of the White Walkers to the encampment at the Fist of the First Men made the conspiracy pointless. A few men who had been discussing betrayal before the massacre at the Fist ultimately stay loyal during the mutiny, while some other men who weren't part of the earlier plot spontaneously join the betrayal when it breaks out.
No punitive action by the Watch is ever taken against the Betrayers. Ollo Lophand and four others are killed by a mysterious person known as "Coldhands", who accompanies Bran Stark and his escorts. Bran wargs into Summer and finds their bodies. It is unknown what has become of the remaining Betrayers.
Those who remain loyal to Mormont and the Watch are:
All the above Loyalists, except Sam, do not engage in fight with the Betrayers but escape. They arrive at Castle Black long before Jon Snow. Sam eventually escapes with Gilly after being urged to do so by some of Craster's wives, and they arrive to Castle Black much later.