Edited sentence: After Abu Sa'id, relations between Christian princes and the Mongols were totally abandoned.At the same time he advocated that he abandons Islam in favour of Christianity.In 1320, the Egyptian sultan Naser Mohammed ibn Kelaoun invaded and ravaged Christian Armenian Cilicia.In a letter dated July 1st, 1322, Pope John XXII sent a letter from Avignon to the Mongol Ilkhanate ruler Abu Sa'id, reminding him of the alliance of his ancestors with Christians, asking him to intervene in Cilicia.Mongols troops were sent to Cilicia, but only arrived after a ceasefire had been negotiated for 15 years between Constantin, patriarch of the Armenians, and the sultan of Egypt