By September 1941, the link with the Volkhov Front (commanded by Kirill Meretskov) was severed and the defensive sectors were held by four armies: 23rd Army in the northern sector, 42nd Army on the western sector, 55th Army on the southern sector, and the 67th Army on the eastern sector. The 8th Army of the Volkhov Front had the responsibility of maintaining the logistic route to the city in coordination with the Ladoga Flotilla. Air cover for the city was provided by the Leningrad military district PVO Corps and Baltic Fleet naval aviation units.