Isakov broke away from teaching with the onset of the Winter War and entered active service; he coordinated not only the movement of naval warships in the Baltic Sea but also the ground forces of the Red Army in the Soviet war against Finland.
From 1941 to 1943 Isakov was the chief of the Main Maritime Staff.
منذ 1941 وحتى 1943، كان Isakov رئيس طاقم البحرية الرئيسي.
منذ 1941 وحتى 1943، كانت Isakov رئيس طاقم البحرية الرئيسي.