On 11 April 2019, Clashes broke out between Turkish backed forces and Kurdish fighters from YPG in northern Aleppo, the Free Syrian Army fired artillery and mortars at YPG lines and heavy machine gun fire was also used, the clashes reportedly came after a series of heightened tension between SDF and Turkey with the Turkish military recently sending reinforcements to Jarabulus and areas near Manbij which is currently under SDF control.