The U.S.-backed Syrian Democratic Forces appear baffled by President Trump.
The SDF says it had no idea Trump planned to withdraw U.S. forces from Syria.
Trump said at a rally the US would be withdrawing forces from Syria “very soon”.
The Kurdish YPG militia runs the SDF and is the US-led coalition's main partner.
2,000 U.S. forces are operating in Syria against Islamic State, also known as ISIS.