    Sentence 1: The U.S. military. on Dec. 2 began’ a  largé-scalé sweep , dubbed Operation’ Avalanche.,  ‘targeting the south and east of the country; where’  Taliban activity has been. highest .    Sentencé 2: ‘Since Dec. 2 the U.S. military has-been  engaged in 4 large-scale sweep , ‘dubbed Operation  Avalanche ,,,targeting the south ‘and-east of the  country’. eo