How US-Turkey deal in Manbij could affect Russia’s influence

Source:al Monitor Date:24Jun2018

After seeing the Turkish military patrolling under the cover of US helicopters, the very first question to be asked was, since there’s no credible evidence of an Islamic State (IS) presence in Manbij, what exactly is the “threat” that the Turkish and US military are patrolling against? What enemy seems to have brought the United States and Turkey together in Manbij?