|Book(s)||The Princess and the Queen (mentioned)|
Prince Jacaerys Velaryon visited White Harbor and Winterfell and enlisted the North for the blacks during the Dance of the Dragons. Lord Manderly sent his sons, the fearsome Ser Medrick and Ser Torrhen Manderly, to aid Rhaenyra Targaryen in King's Landing. After Rhaenyra lost two dragons to the Two Betrayers, the Manderly brothers argued that Addam Velaryon and Nettles were also untrustworthy.
During the riots at King's Landing, Medrick led a hundred White Harbor men and restored order in the area between Aegon's high hill and the Iron Gate. The Manderly brothers accompanied Rhaenyra when she fled the capital after the Storming of the Dragonpit. Medrick asked Rhaenyra to travel to White Harbor, but she insisted on sailing instead to Dragonstone without the Manderlys.