Emesa and Chalcis sued for peace for a year. Abu Ubaidah, accepted the offer and rather than invading the districts of Emesa and Chalcis, he consolidated his rule in conquered land and captured Hama, Maarrat al-Nu'man. The peace treaties were, however, on Heraclius's instructions, to lure the Muslims and to secure time for preparation of defenses of northern Syria (present day Lebanon, Syria and southern Turkey). Having mustered sizeable armies at Antioch, Heraclius sent them to reinforce strategically important areas of northern Syria, like Emesa and Chalcis. With the arrival of Byzantine army in the city, the peace treaty was violated, Abu Ubadiah and Khalid thus marched to Emesa, and a Byzantine army that halted Khalid's advance guard was defeated. The Muslims besieged Emesa which was finally conquered in March 636 after six months of siege.