    ‘Sentencé 1 Which empire ‘bordered the Mongol  Exipire to the west in 12187,    Sentence 2:.By 1218 as a resuti of defeat of ara  Khitai, the Mongol Empiré and its: controt extended. as  far west: as Lake Balkhdsh, whith’ bordered the  ‘Khwarézmia:(Khwarezmid Empire), a’ Muslim state  that redched the Caspian:Seti:to thé west and Persian  Gulf and the Arabian Sea to'the south,