Visenya Conquers The Vale

«Sharra Arryn had streghtened the defenses of Gulltown, moved a strong host to the Bloody Gate and tripled the size of the garrisons in [...] the waycastles that guarded the approach to the Eyrie. All these defenses proved useless against Visenya Targaryen, who rode Vhagar's leathery wings above them all and landed in the Eyrie's inner courtyard. When the regent of the Vale rushed out to confront her, with a dozen guards at her back, she found Visenya with Ronnel Arryn seated on her knee, staring at the dragon, wonder-struck. "Mother, can I go flying with the lady?" the boy king asked. No threats were spoken, no angry words exchanged. The two queens smiled at one another and exchanged courtesies instead. Then Lady Sharra sent for the three crowns [...] and surrendered them to Queen Visenya, along with the swords of her garrison. [...] Thus did Visenya Targaryen bring the Vale of Arryn into her brother's realm.»
- The World of Ice and Fire, George R.R. Martin