Two weeks after Turkey launched Operation Peace Spring in northeast Syria to expel Kurdish militants from its southern border and establish a so-called safe zone, fighting has largely ended as result of an agreement reached by Turkish President Recep Tayyip Erdogan and Russian President Vladimir Putin on Tuesday.

Meeting in Sochi, the two leaders agreed to deploy their forces across most of the northeastern Syrian border and conduct joint patrols along a corridor 10 kilometers (6 miles) deep, while Kurdish-led forces supported by the United States have withdrawn from an area 30 kilometers (19 miles) deep. Meanwhile, the Operation Peace Spring area between the Syrian towns of Tell Abyad and Ras al-Ain will remain under the control of the Turkish military and Turkish-backed Syrian forces.

The Syrian regime stated Wednesday it would establish 15 observation posts in the region. Turkish officials will seek to reestablish terms set by the 1998 Adana agreement between Ankara and Damascus in which Turkish forces would be able to carry out security operations within a 5-kilometer (3-mile) band along the Syrian border.

“Adana more or less gives Turkey what it wants … [which is] to break the US-SDF agreement,” said Aaron Stein, director of the Middle East program at the Foreign Policy Research Institute, using the acronym for the US-backed, Kurdish-led Syrian Democratic Forces, which Ankara considers a security threat.