World War II: Polish insurgents liberate a German labor camp (Gęsiówka) in Warsaw, freeing 348 Jewish prisoners.

Gsiwka (Polish pronunciation: [ufka]) is the colloquial Polish name for a prison that once existed on Gsia ("Goose") Street in Warsaw, Poland, and which, under German occupation during World War II, became a Nazi concentration camp.

In 194556 the Gsiwka served as a prison and labor camp, operated first by the Soviet NKVD to imprison Polish resistance fighters of the Home Army and other opponents of Poland's new Stalinist regime, then by the Polish communist secret police.

A labor camp (or labour camp, see spelling differences) or work camp is a detention facility where inmates are forced to engage in penal labor as a form of punishment. Labor camps have many common aspects with slavery and with prisons (especially prison farms). Conditions at labor camps vary widely depending on the operators. Convention no. 105 of the United Nations International Labour Organization (ILO), adopted internationally on 27 June 1957, abolished camps of forced labor.In the 20th century, a new category of labor camps developed for the imprisonment of millions of people who were not criminals per se, but political opponents (real or imagined) and various so-called undesirables under communist and fascist regimes. Some of those camps were dubbed "reeducation facilities" for political coercion, but most others served as backbones of industry and agriculture for the benefit of the state, especially in times of war.