People's Militias (in Slovak Ľudové milície, in Czech Lidové milice), also called The Armed Fist of the Working Class (in Slovak Ozbrojená päsť robotníckej triedy, in Czech Ozbrojená pěst dělnické třídy) was a militia organisation of the Communist Party of Czechoslovakia between 1948 and 1989.

The militias were hastily equipped and set on alert during the communist takeover of power at the end of February.

The task of the militias was to protect against guerrillas expected to appear after the takeover, against undercover agents sent to Czechoslovakia and to cooperate with the police and the army.

Toward the end of the 1980s, political tensions in Czechoslovakia increased and the militias, equipped with batons, were frequently deployed to disperse demonstrations against the regime.

During February 1948 the militias obtained 10,000 rifles and 2,000 submachine guns from the armament factory Zbrojovka Brno.