The US and Turkey had previously clashed diplomatically over the issue of the SDF-held city of Manbij, with Turkey wanting to purge the city of the YPG units stationed there. The result was a 'Manbij Roadmap' being agreed to by Turkey and the US, which would eventually entail in a YPG withdrawal from the city.[13] The roadmap, however, was never implemented and the YPG never withdrew.