guberniyas: six Belarusian and Lithuanian ones that constituted the Northwestern Krai (Vilna Governorate, Kovno Governorate, Grodno Governorate, Minsk Governorate, Mogilev Governorate and Vitebsk Governorate) and three Ukrainian ones that constituted the Southwestern Krai (Volhynia Governorate, Podolia Governorate and Kiev Governorate). In the first partition, Russia gained 92,000 km² and 1.3 million people. In the second, 250,000 km² and 1 million people. In the third, 120,000 km² and 1.2 million people. Overall, Russia had gained about 62 percent of the former Commonwealth territory (462,000 km²) and about 45 percent of the population (3.5 million people). The Russian partition was thus the largest and most populous of the three partitions (the other two being the Austrian Partition and the Prussian Partition). For changes in the administrative division of the Russian partition in the 19th century, see administrative division of Congress Poland. During World War I (1914–1918), many of the territories were occupied by the Central Powers (primarily, German Empire) and came to be administered by the Ober Ost. See also History of Poland (1795–1918) References Further reading Norman Davies: God's Playground, p. 60-82: ROSSIYA: The Russian Partition (1772-1918) History of Poland (1795–1918) History of the administrative divisions of Russia Historical regions in Ukraine Historical regions in Belarus Historical regions in Lithuania Historical regions in Latvia Subdivisions of Poland