 Complete the following phrase:  Muawiya and his father Abu Sufyan had opposed Muhammad, their distant Qurayshite kinsman and later Muawiyas brother-in-law, until Muhammad captured Mecca in 630. Afterward, Muawiya became one of Muhammads scribes. He was appointed by Caliph Abu Bakr  a deputy commander in the conquest of Syria. He moved up the ranks until becoming governor of Syria during the reign of his kinsman, Caliph Uthman . He allied with the provinces powerful Banu Kalb tribe, developed the defenses of its coastal cities and directed the 