The ÁVH (State Security Office) was established in 1948 in Hungary to function as the "fist of the working class" and fight against "reactionary elements". It acted as Hungary's secret police force, conducting interrogations using torture methods like physical brutality, sleep deprivation, and electric shocks. Prisoners faced inhumane conditions in the ÁVH's underground labyrinthine prisons, with little food or sleep. In 1956, during the Hungarian Revolution, the ÁVH fought alongside Soviet troops but faced public anger, and some officers were lynched by rebels seeking to dismantle the secret police force.