WASHINGTON: A Turkish ground operation in Syria would “severely jeopardize” gains made in the war against Daesh, the Pentagon said on Tuesday, urging restraint. Turkiye has carried out air strikes against semi-autonomous Kurdish zones in Syria and Iraq since a deadly Istanbul bombing it blames on Kurdish groups, and has threatened to launch an operation on the ground in Syria. The US-supported Syrian Democratic Forces (SDF), now the Kurds’ de facto army in northeast Syria, have played a key role in dislodging Daesh fighters from the territory they seized in the country. “The continued conflict, especially a ground invasion, would severely jeopardize the hard-fought gains that the world has achieved against Daesh and would destabilize the region,” Pentagon Press Secretary Brig. Gen. Pat Ryder told journalists. “We... remain concerned about a potential Turkish ground operation in Syria, and again would urge restraint,” he said, while also acknowledging Ankara’s security concerns. Ryder said US forces have reduced the number of joint patrols with the SDF, but have not redeployed. “We have reduced the number of patrols because... we do these partnering with the SDF, and so they have reduced the number of patrols that they’re doing,” he said.Since 2016, Turkiye has launched several incursions against Kurdish forces in northern Syria that have allowed it to control areas along the border.