Sippenhaft or Sippenhaftung (, kin liability) is a German term for the idea that a family or clan shares the responsibility for a crime or act committed by one of its members, justifying collective punishment. As a legal principle, it was derived from Germanic law in the Middle Ages, usually in the form of fines and compensations. It was adopted by Nazi Germany to justify the punishment of kin (relatives, spouse) for the offence of a family member. Punishment often involved imprisonment and execution, and was applied to relatives of the conspirators of the failed 1944 bomb plot to assassinate Hitler. Origins Prior to the adoption of Roman law and Christianity, Sippenhaft was a common legal principle among Germanic peoples, including Anglo-Saxons and Scandinavians. Germanic laws distinguished between two forms of justice for severe crimes such as murder: blood revenge, or extrajudicial killing; and blood money, pecuniary restitution or fines in lieu of revenge, based on the weregild or "man price" determined by the victim's wealth and social status. The principle of Sippenhaft meant that the family or clan of an offender, as well as the offender, could be subject to revenge or could be liable to pay restitution. Similar principles were common to Celts, Teutons, and Slavs. Nazi Germany In Nazi Germany, the term was revived to justify the punishment of kin (relatives, spouse) for the offence of a family member. In that form of Sippenhaft, the relatives of persons accused of crimes against the state were held to share the responsibility for those crimes and subject to arrest and sometimes execution. Examples of Sippenhaft being used as a threat exist within the Wehrmacht from around 1943. Soldiers accused of having "blood impurities" or soldiers conscripted from outside of Germany also began to have their families threatened and punished with Sippenhaft. An example is the case of Panzergrenadier Wenzeslaus Leiss, who was accused of desertion on the Eastern Front in December 1942. After the Düsseldorf Gestapo discovered supposed Polish links in the Leiss family, in February 1943 his wife, two-year-old daughter, two brothers, sister and brother-in-law were arrested and executed at Sachsenhausen concentration camp. By 1944, several general and individual directives were ordered within divisions and corps, threatening troops with consequences against their families. Many people who had committed no crimes were arrested and punished under Sippenhaft decrees introduced after the failed 20 July plot to assassinate Adolf Hitler