though the Germans knew that the system was unsustainable; most inmates had no chance of earning their own keep, and no savings left to pay the SS for any further basic food deliveries. Forced labour In October 1939, the Nazis passed a decree on forced labour for Jews over the age of 12 and Poles over the age of 14 living in the General Government. Between 1939 and 1945, some 3 million Polish citizens were transported to the Reich for slave labor, many of them teenage boys and girls. Although Germany also used forced laborers from Western Europe, Poles and other Eastern Europeans viewed as racially inferior were subjected to intensified discriminatory measures. Polish laborers were compelled to work longer hours for lower than the regular symbolic pay of Western Europeans. They were forced to wear identifying purple tags with "P"s sewn to their clothing, subjected to a curfew, and banned from public transportation. While the treatment of factory workers or farm hands often varied depending on the individual employer, in many cities Poles were forced to live in segregated barracks behind barbed wire. Social relations with Germans outside work were forbidden, and sexual relations ("racial defilement") were considered a capital crime punishable by death. During the war, hundreds of Polish men were executed for their relations with German women. Historian Jan Gross estimated "no more than 15 per cent" of all the Poles who went to Germany did so voluntarily. Mass rapes were committed against Polish women and girls including during punitive executions of Polish citizens, before shooting of the women. Additionally, large numbers of Polish women were routinely captured with the aim of forcing them into serving in German military brothels. Mass raids were conducted by the Nazis in many Polish cities with the express aim of capturing young women, later forced to work in brothels attended by German soldiers and officers. Girls as young as 15 years old, who were ostensibly classified as "suitable for agricultural work in Germany", were sexually exploited by German soldiers at their places of destination. Germanization In Reichsgau Wartheland territories of occupied Greater Poland, the Nazi goal was a complete Germanization of the land: i.e. the assimilation politically, culturally, socially and economically into the German Reich. This did not mean the old style Germanization of the inhabitantsby teaching them the language and culturebut rather, the flooding of the Reichsgau with assumed pure