After Roderic came to power in Spain, Julian had, as was the custom, sent his daughter, Florinda la Cava, to the court of the Visigothic king for education. It is said that Roderic raped her, and that Julian was so incensed he resolved to have the Muslims bring down the Visigothic kingdom. Accordingly, he entered into a treaty with Ṭāriq (Mūsā having returned to Qayrawan) to secretly convoy the Muslim army across the Straits of Gibraltar, as he owned a number of merchant ships and had his own forts on the Spanish mainland .