The culmination of the series of communist-led strikes came in December 1920 when the union of miners of Bosnia and Herzegovina called for general strike. On 24 December, the Council of ministers proclaimed a decree that called for
militarization of any district where miner strike occurs. The strikes soon spread to Slovenia. In a few days, the miners strike turned into the
Husino rebellion in which 7 miners were killed, and hundreds of participants were arrested. In solidarity with the Bosnian miners, the communist-led Central Trade Union Council of Yugoslavia called for a general strike of all workers to be held on 30 December. This was a signal to the government for an all-out attack on the communists. Already on 30 December, the police closed all communist-affiliated workers unions and confiscated their property and archives. Communist organizations were banned and all their property confiscated. All communist-affiliated newspapers were closed down too.
Content Obznana did not outlaw the CPY as such, but it did prohibit "communist propaganda". In the introduction,
Obznana explained how the government has strong evidence that the communists plan to overthrow the Kingdom and form a Soviet-style government instead. Then it proceeds to explain that the communists are planning a bloody civil war and that they are being financed by the enemies of the state. It claims that the communist propaganda has infected many naive citizens and trade unions, and that the communists actively work to demoralize the army and the police. After that, the citizens are warned not to allow communist revolution as it
happened in Russia and
in Hungary. After this introduction, the decree orders: • Any kind of communist propaganda to be banned until the adoption of the constitution. Also, all communist-associated organizations, newspapers and meeting houses are to be closed. Any person who calls for a general strike should be arrested and imprisoned for a month. • Any printed publication that "reduces the importance of this decree" is to be banned. • In case of "disorder with a destructive character", leaders and moral supporters are to be punished. • Every citizen possessing firearms has to register it with the police. If unregistered firearm or explosive is found, owner is to be punished with three months' imprisoned . • During the convocation of the Constituent Assembly, all "manifestations of disruptive or exciting character" in Belgrade are to be banned. Whoever tries armed resistance against the state is to be taken to the military court. • Any foreign citizen involved in "disturbances" is to be banished from the state. • Any civil servant who engages in "bolshevik propaganda" is to be fired. Communist students are to be denied of state scholarships. == Reactions ==