After the Holocaust, which had been perpetrated by Nazi Germany prior to and during World War II, Lemkin successfully campaigned for the universal acceptance of international laws defining and forbidding genocides. In 1946, the first session of the United Nations General Assembly adopted a resolution that affirmed genocide was a crime under international law and enumerated examples of such events (but did not provide a full legal definition of the crime). In 1948, the UN General Assembly adopted the Convention on the Prevention and Punishment of the Crime of Genocide (CPPCG) which defined the crime of genocide for the first time.
