During the War of the Usurper, before the sack of King's Landing, the Targaryen Queen Rhaella, who was pregnant, and her son Viserys were sent to Dragonstone along with part of the Targaryen fleet and a garrison of loyal soldiers. But after King's Landing fell, Robert Baratheon dispatched his brother Stannis to take the island stronghold. After a storm destroyed the royalist fleet, the Targaryen garrison tried to betray Viserys and his newborn sister, Daenerys, to Stannis (the queen had died in childbirth). But Targaryen loyalists led by Ser Willem Darry took the children away. Stannis conquered Dragonstone easily, and King Robert granted him ownership of the castle. Stannis felt slighted because his younger brother Renly then inherited Storm's End, the ancient seat of House Baratheon. Ser Axell Florent, one of the uncles of Stannis' wife Selyse Florent, acted as castellan.