Since 1918 Mazovia has been a part of the resurrected Poland, being roughly equivalent to the Warsaw Voivodeship. Under the German occupation during World War II, the population was subjected to mass arrests, executions, expulsions and deportations to forced labour, Nazi concentration camps and Nazi ghettos. Numerous sites were looted. The large Palmiry massacres were carried out in the village of Palmiry near Warsaw. It is one of the most infamous sites of Nazi German crimes against Poles. The population of Warsaw decreased sharply as a result of executions, the extermination of the city's Jews, the deaths of some 200,000 inhabitants during the Warsaw Uprising of 1944, and the deportation of the city's left-bank population following the uprising. Shortly after the uprising, Adolf Hitler ordered German troops to destroy the city. The rebuilding of the Polish capital was the main task of the postwar period. Those times Warsaw Voivodeship was still roughly similar to historical Mazovia and used to be informally called so, but in 1975 it was divided into several little voivodeships. However, in 1999 Mazovian Voivodeship was created as one of 16 administrative regions of Poland.