evidence: In 1941, in spite of Yugoslav attempts to remain neutral, the Axis powers invaded Yugoslavia. The territory of modern Serbia was divided between Hungary, Bulgaria, the Independent State of Croatia, Greater Albania and Montenegro, while the remainder was placed under the military administration of Nazi Germany, with Serbian puppet governments led by Milan Aćimović and Milan Nedić assisted by Dimitrije Ljotić's fascist organization Yugoslav National Movement (Zbor). [...] Belgrade, the capital of FPR Yugoslavia and PR Serbia, hosted the first Non-Aligned Movement Summit in September 1961, as well as the first major gathering of the Organization for Security and Co-operation in Europe (OSCE) with the aim of implementing the Helsinki Accords from October 1977 to March 1978.[122][123] The 1972 smallpox outbreak in SAP Kosovo and other parts of SR Serbia was the last major outbreak of smallpox in Europe since World War II.[124] [...] - Samardžić, Radovan; Duškov, Milan, eds. (1993). Serbs in European Civilization. Belgrade: Nova, Serbian Academy of Sciences and Arts, Institute for Balkan Studies. ISBN 978-86-7583-015-3.