The Wawer massacre refers to the execution of 107 Polish civilians on the night of 26 to 27 December 1939 by the German occupiers of Wawer, Poland. The execution was a response to the killing of two German soldiers in a shootout by two petty criminals. An order to arrest at random any men inhabiting Wawer and the neighboring Anin between the ages of 16 and 70 was given and, as a result, 120 men, who were unrelated to the shootout, were gathered, and a show trial was hastily organized. 114 were declared "guilty" and sentenced to death, the others were spared to bury the dead. In total, 107 were killed and 7 survived, as they withstood the gunfire and were not finished off later.

A minor sabotage during World War II in Nazi-occupied Poland (1939–45) was any underground resistance operation that involved a disruptive but relatively minor and non-violent form of defiance, such as the painting of graffiti, the manufacture of fake documents, the disrupting of German propaganda campaigns, and the like. Minor-sabotage operations often involved elements of humor.