The territory of Ukraine was one of the main battlefields during World War II, and its population, including Russians, significantly decreased. The infrastructure was heavily damaged and it required human and capital resources to be rebuilt. This compounded with depopulation caused by two famines of 1931–1932 and a third in 1947 to leave the territory with a greatly reduced population. A large portion of the wave of new migrants to industrialize, integrate and Sovietize the recently acquired western Ukrainian territories were ethnic Russians who mostly settled around industrial centers and military garrisons. This increased the proportion of the Russian speaking population.