 The Soviet Union enjoyed air superiority throughout the war . The Soviet Air Force , supporting the Red Army 's invasion with about 2 @,@ 500 aircraft ( the most common of which was the Tupolev SB ) was not as effective as the Soviets might have hoped . The material damage by the bomb raids was slight as Finland did not offer many valuable targets for strategic bombing . Very often , targets were small village depots with little value . The country had only a few modern highways in the interior , therefore making railway systems the main targets for bombers . The rail tracks were cut thousands of times , but they were easy to repair and the Finns usually had trains running again in a matter of hours . The Soviet air force learned from its early mistakes , and by late February they instituted more effective tactics . 
