Following the death of Josef Stalin in 1953 many European communist countries developed liberal reformist factions. In Hungary the reformist Imre Nagy became Prime Minister but his attempts at reform were thwarted by Rákosi General Secretary of the Communist party. Rákosi used every opportunity to discredit Nagy and in 1955 had him removed from office. In July 1956 Rákosi was deposed and replaced by Ernő Gerő.
In Poland a revolt staged in June 1956 had resulted in reformist concessions being granted by Russia on October 19.
News of the Polish concessions encouraged Hungarians who hoped to win similar concessions for Hungary.
On the afternoon of 23rd October 1956 thousands of Hungarian students took to the streets protesting against Russian rule. Their 16 key demands included a return to power of Imre Nagy, free elections and evacuation of all Soviet troops.
By early evening the number of protestors had grown to 200,000. At 8pm Ernő Gerő made a broadcast condemning the demands as lies and stating that the country did not want to sever its ties with Russia. Angered by the broadcast some demonstrators tore down the statue of Stalin while others marched to the Radio building and attempted to gain access. The security police (ÁVH) threw tear gas on the crowd and opened fire killing some demonstrators. In response the demonstration became violent, communist symbols were destroyed and police cars set alight.
Ernő Gerő requested Soviet military intervention and at 2am on 24th October Soviet tanks entered Budapest. However, the demonstration continued as many soldiers sympathised with the demonstrators. Imre Nagy was reinstated as Prime Minister on 24th October and called for an end to violence. However, sporadic outbursts of fighting continued until 28th October when the Russian army withdrew from Budapest.
The new Hungarian government immediately set about implementing its policies which included democracy, freedom of speech, and freedom of religion. However, on 1st November Nagy received reports that Russian tanks had entered eastern Hungary. On 4th November the tanks reached and encircled Budapest. Nagy made a broadcast to the world that Hungary was under attack from Soviet forces. Around 4000 Hungarians were killed between 4th and 10th November when the Russians took control.