The census was held on 6 January 1937. In addition to the general census in the cities, towns and villages, a special census was held by the NKVD in the Gulag camps and among the border guards; by the Red Army, which took a census of military personnel; and the railroad, which took a census of passengers. When the data was first processed, it soon became obvious that the final enumeration would be little more than 162 million people. The worst disagreement between the expected and the obtained data were in Kazakhstan, Ukraine, North Caucasus and the Volga region, the areas that were the strongest hit by the Soviet famine of 1932–1934.