Ka cika wannan jumla: Sashe na biyu ya soma da zuwan Khalid ibn al-Walid da rundunarsa zuwa Siriya a shekara ta 634. A karkashin babban kwamandan Khalid, sojojin musulmi sun kewaye su kuma sun kama cibiyoyin biranen kudancin Siriya na Bosra,
Damascus, Beisan (Scythopolis), Pella, Gaza, da kuma na ɗan lokaci, Homs (Emesa) da Baalbek (Hierapolis). Heraclius ya amsa ta wurin tura rundunar sojojin daular da suka biyo baya a kan Musulmai. Byzantines sun yi nasara sosai a sakamakon manyan yaƙe-yaƙe na Ajnadayn a Falasɗinu da Fahl da Yarmouk a Transjordan, duk sun faru a cikin 634-636. Nasarar da Musulmai suka yi a fagen yaƙi ya kawo ƙarshen tsayayya ta Byzantines.