Yaƙin Masts (Larabci: معركة ذات الصواري, romanized: Ma'rakat Dhāt al-Ṣawārī) ko Yaƙin Phoenix ya kasance muhimmin yaƙin sojan ruwa da aka yi a 654 (AH 34) tsakanin Larabawa Musulmai da Abu al-A'war ke jagoranta. da rundunar jiragen ruwa ta Byzantine a karkashin umurnin sarki Constans II. Ana ganin yaƙin shine "rikicin farko na musulinci mai zurfi" da kuma wani ɓangare na farkon kamfen ɗin da Muawiyah ya yi don cin Constantinople. Al-Tabari ya rubuta ranakun biyu masu yiwuwa don wannan yaƙin na sojan ruwa: 651-2 (AH 31) akan al-Waqidi da 654-5 (A.H. 34) akan ikon Abu Ma'shar al-Sindi. Tarihin Sebeos na Armeniyawa da Byzantine Theophanes sun yi daidai da ƙarshen kwanan wata. A cikin shekarun 650s Halifancin Larabawa ya gama daular Sasanian kuma ya ci gaba da samun nasarar faɗaɗa cikin yankunan daular Byzantine. A shekara ta 645, dan uwansa Rashidun Khalifa Uthman ya nada Abdallah ibn Sa'ad a matsayin gwamnan Masar, inda ya maye gurbin Amr bn al-As.