On 7 October 2015, shortly after the start of the Russian air campaign in Syria, the Syrian government forces and its allies launched a ground offensive against anti-government positions in northwestern Syria, initially in northern Hama Governorate. The primary objective is to seal off the northern Hama border with Idlib and "build a buffer-zone around the city of Khan Sheikhoun". It has been described as the first major Syrian-Russian coordinated attack since the start of the Syrian Civil War. The offensive was extended in the subsequent days to the al-Ghab plains, between northwest Hama and southwest Idlib, as well as to the edge of the Latakia governorate.