The territory of Transylvania was part of Austria-Hungary during World War I. The following estimates of Romanian deaths, within contemporary borders, during World War I were made by a Russian historian in a 2004 handbook of human losses in the 20th century. Total dead: 748,000, including military losses of 220,000 with the Romanian forces, 150,000 with the Austro-Hungarian forces and POW deaths in captivity of 48,000. Civilian dead were as follows due to famine and disease: 200,000, killed in military operations 120,000 and 10,000 dead in Austrian prisons.