When word reached the stormlands that Lord Jon Arryn had raised his banners and that Robert Baratheon had slipped free of King's Landing to join him, three of the storm lords stayed loyal to the Iron Throne and mustered their strength to bring the young Lord of Storm's End to heel. Lord Grandison of Grandview, Lord Cafferen of Fawnton, and Lord Fell of Felwood each marched separately toward Summerhall, the ruined seat of the Targaryens in the Dornish Marches, meaning to unite their hosts there and crush the rebellion in its cradle. Robert, learning of their movements, resolved not to let them meet.
In a single day, so the tale is told, Robert fought and won three battles at Summerhall, falling upon each host in turn before it could join with the others. He slew Lord Fell in the fighting and took Fell's son, the knight men called Silveraxe, captive; the lords Grandison and Cafferen he defeated and afterward won to his own cause, so that the swords sent to destroy him swelled his ranks instead. The triple victory made Robert's name early in the war and lent him a reputation for boldness in the field that the loyalists would learn to fear before the Trident.