Jonos Arryn’s Coup was one of several uprisings that challenged King Aenys’s authority, and it turned the Vale’s succession into a crisis of imprisonment, siege, and forcible restoration. Jonos seized power from his elder brother, Lord Ronnel Arryn, and proclaimed himself King of Mountain and Vale; the revolt was eventually ended by Maegor, whose arrival on Balerion forced the Eyrie’s defenders to yield.

Background and Rebellion

The coup unfolded amid a wider collapse of royal order. While Aenys was away from King’s Landing, rebels rose at Harrenhal, a claimant appeared in the Iron Islands, and the Vulture King gathered support in Dorne. In the Vale, Jonos deposed and imprisoned Ronnel, his loyal elder brother, and declared himself king. The self-styled title set his seizure of the Eyrie against the Targaryen settlement of the realm, in which local rulers held authority under the Iron Throne.

The king’s uncertainty gave his lords room to act. Aenys considered how to respond to the several rebellions at once, but his hesitation meant that others took the field before he settled on a course. In the Vale, Lord Allard Royce of Runestone assembled forty loyal bannermen and marched against the Eyrie. The loyalists defeated Jonos’s supporters and demanded that Ronnel be released. Ronnel, who had once flown three times around the Giant’s Lance on dragonback, did not regain his freedom: Jonos sent him through the Moon Door, killing him.

The Eyrie and Maegor’s Intervention

The Eyrie’s position made a conventional assault impractical. Jonos and his remaining followers rejected the loyalists’ demands and prepared to withstand a siege, relying on the castle’s defenses. The balance changed when Maegor appeared above the Eyrie riding Balerion, the Black Dread. Maegor had at last claimed a dragon, and the immense threat of Balerion’s fire left the garrison facing a choice between surrender and destruction.

The garrison seized Jonos and delivered him to Lord Royce. The Moon Door was opened again, and Jonos was killed in the same manner he had used against his brother. His capture ended the coup, but surrender did not spare his committed followers. After taking possession of the Eyrie, Maegor executed them. The captured knights were denied death by the sword and hanged instead, a punishment that marked the restoration as a deliberate act of royal severity as well as a military victory.

Restoration and Significance

Hubert Arryn, a cousin of the dead brothers, was installed as Lord of the Vale. His marriage to a Royce of Runestone and the fact that he had already fathered six sons were presented as assurances that the Arryn succession would be secure. The settlement thus joined the Vale’s restoration to the same noble connections that had helped defeat Jonos: Royce loyalty was reinforced by a Royce marriage into the new lord’s household.

The coup ended not through Aenys’s direct intervention but through the initiative of loyal Vale forces and Maegor’s overwhelming use of dragon power. Its resolution restored the lordship while making the cost of rebellion unmistakable. Ronnel’s death and the executions at the Eyrie also left the restoration founded on coercion, not reconciliation.