Members of the Syrian Democratic Forces (SDF) liberating Raqqa within the last week were photographed in front of a banner featuring the image of jailed PKK leader Abdullah Ocalan, a Kurdish leader who has been identified as a terrorist by both the United States and Turkey.

Ocalan is recognized as the founder of the PKK, or Kurdistan Workers’ Party, a Kurdish terrorist group that has been responsible for attacks inside Turkey for decades, and a group which the United States has continuously asserted plays no part in the Kurdish YPG forces that make up the SDF.

It’s no secret that Ocalan plays an important role in the political ideology of many Kurdish militant groups, but considering the U.S. has relied heavily on these Kurdish units to clear ISIS from its strongholds across Iraq and Syria, and armed and supported them accordingly, it certainly won’t help the relationship between Ankara and Washington.