It was a Hungarian People's Republic event lead by Imre Nagy in 1956. Many Significant events of the Hungarian Revolution of 1956 took place and many people died. The 1956 Georgian demonstrations occurred in the same year. The revolutionary forces in Budapest destroyed the Stalin Monument in Budapest. The USSR crushed the riseing and the Workers' Militia was formed there after.
See this specialist site for more- http://hungary-1956.wikia.com/wiki/Hungary_1956_Wikia