After the II World War, the Allied forces (Great Britain, Soviet Union, USA) and France divided Germany in four occupation zones, which served at the same time as administrative districts.

The Oder-Neisse line equals the course of the current German-Polish border which was defined at the end of World War II during the Potsdam Conference. In point of fact, the Soviet Union had already attributed the territories on the Eastern side of that line to Polish administration before the conference started. The final acknowledgement of the border by the reunited German state was framed by the so-called Two Plus Four Agreement in 1990.

A party or group that is either rejecting or resisting the politics of the ruling authorities.