American warplanes were diverted from an offensive launched against the Islamic State last week by U.S.-backed rebels in Syria in order to bomb a more enticing target in Iraq, withdrawing air support at a critical moment and contributing to the failure of the rebel operation, according to U.S. officials familiar with the incident.
https://www.washingtonpost.com/news/checkpoint/wp/2016/07/06/u-s-jets-abandoned-syrian-rebels-in-the-desert-then-they-lost-a-battle-to-isis/