 The commanders of the crusader army decided to continue the invasion of Egypt , despite ( according to Philip d <unk> ) John 's strong opposition . The crusaders approached <unk> , but the Egyptians imposed a blockade on their camp . <unk> , Pelagius agreed to an eight @-@ year truce with Al @-@ Kamil in exchange for Damietta on 28 August . John was among the crusade leaders held hostage by Al @-@ Kamil until the crusader army withdrew from Damietta on 8 September . 
