 The outbreak of the Hungarian Revolution on 23 October 1956 saw Nagy elevated to the position of Prime Minister on 24 October as a central demand of the revolutionaries and common people.Nagy's reformist faction gained full control of the government, admitted non-communist politicians, dissolved the ÁVH secret police, promised democratic reforms, and unilaterally withdrew Hungary from the Warsaw Pact on 1 November.The Soviet Union launched a massive military invasion of Hungary on 4 November, forcibly deposing Nagy, who fled to the Embassy of Yugoslavia in Budapest.