In World War II Estonia had suffered huge losses. Ports had been destroyed, and 45% of industry and 40% of the railways had become damaged. Estonia's population had decreased by one-fifth, about 200,000 people. Some 10% of the population (over 80,000 people) had fled to the West between 1940 and 1944, first to countries such as Sweden and Finland and then to other western countries, often by refugee ships such as the SS Walnut. More than 30,000 soldiers had been killed in action. In 1944 Russian air raids had destroyed Narva and one-third of the residential area in Tallinn. By the late autumn of 1944, Soviet forces had ushered in a second phase of Soviet rule on the heels of the German troops withdrawing from Estonia, and followed it up by a new wave of arrests and executions of people considered disloyal to the Soviets.