 The air assets were attached to the Modlin Army and the Narew Group fighting against the German units trying to break through from East Prussia.By 7 September the 35th Division was fully mobilized and transported to Lvov (modern Lviv, Ukraine); the city was left defenceless.The military commander of the city, Colonel Jarosław Okulicz-Kozaryn, decided that in case of attack by German or Soviet forces, he had insufficient forces for a successful defence and thus his task could only be to allow civilians to evacuate to neutral Lithuania (this was also realised, albeit not very clearly, by General Józef Olszyna-Wilczyński, commander of the 3rd military district which Wilno was also in).