Complex sentence: The operation ended on the 14 July with total Marine casualties for the operation of 159 killed, 345 wounded while the NVA suffered 1,290 confirmed killed and a further 513 probably killed.
Split into simpler sentences: The operation ended on the 14 July with total Marine casualties for the operation of 159 killed, 345 wounded. U.S reported the NVA suffered 1,290 confirmed killed and a further 513 probably killed.