It was Ungary. The revolution started on 23rd October and ended on 4th November 1956.
It was born as a pacific manifestation but soon became an anti-soviet revolution. People were poor, economy collapsed and there was low standard of life; farmers didn't receive any advantages from the politics of the USSR. They wanted a model like the one that wanted Nagy: libertarian socialism and liberaldemocracy.
The ÁVH and Soviet troups tried to stop this revolution, but they failed and Ungary won.