Hour of the Wolf
The Hour of the Wolf refers to the six days in 131 AC when Cregan Stark, Lord of Winterfell and Warden of the North, governed in King's Landing, at the end of the Dance of the Dragons. It is named after the hour of the wolf, which is believed to be the blackest part of nighttime.
As the Lads' rivermen and Cregan's northmen approached King's Landing, King Aegon II Targaryen was found poisoned. Lord Corlys Velaryon sent envoys to bring peace to the realm as Aegon's nephew, Aegon III Targaryen, took the Iron Throne.
Although Lord Cregan had been one of the blacks in opposition to Aegon II and the greens, the vengeful lord sought justice for the poisoned king. Twenty-two men were arrested, including Corlys the Sea Snake and Lord Larys Strong, and the eleven-year-old Aegon III named Cregan his Hand of the King.
Aegon III was convinced by his half-sisters, Baela and Rhaena Targaryen, to restore Corlys to his office. To ensure the edict would stand, Black Aly Blackwood agreed to marry Cregan and Lord Velaryon thus avoided trial.
Nineteen of the remaining accused agreed to take the black, while only Larys Clubfoot and Ser Gyles Belgrave accepted execution. Cregan resigned the day after the executions, having been Hand for only a day. He returned to the North, although some of his followers remained south of the Neck.