	Commonwealth borders shifted with wars and treaties, sometimes several times in a decade, especially in the eastern and southern parts. After the Peace of Jam Zapolski (1582), the Commonwealth had approximately 815,000 km area and a population of 7.5 million. After the Truce of Deulino (1618), the Commonwealth had an area of some 1 million km (990,000 km) and a population of about 11 million.