In the midst of the red terror of the government of Béla Kun, the leader of the Hungarian Revolution, hundreds of suspected counter-revolutionaries were executed in May 1919, and Lenin's son posed with their corpses.

 　Hundreds of people accused of “counterrevolution” were executed by the death penalty in May 1919 during the “Red Terror” of the Kun regime led by Béla Kun, the leader of the Hungarian Revolution. 1919 , the bodies of victims of the Red Terror and the revolutionary terrorist group Lenin's Boys were posed. In the spring of 1919, the Kun regime was overthrown by an invasion by the Romanian army and was short-lived.

　　In November 1918, with the support of the Soviet Union, Kun established the Communist Party of Hungary. He launched a campaign against the government of Mihály Károly. In March 1919, after being released, Kun successfully staged a coup and declared the establishment of the Communist Hungarian Soviet Republic. The new government collapsed four months later in the face of the advance of Romanian troops. After the fall of the Kun regime, counterrevolutionary forces carried out reprisals in the form of similar massacres. In the Great Purge of the late 1930s, Stalin had Kun executed by court order.

　　The Hungarian Red Terror was a period of repressive violence and suppression carried out by the Hungarian Communist Party in the Hungarian Soviet Republic, which existed from March 21 to August 1, 1919. The main anti-communist forces massacred people they considered to be enemies of the state. The Hungarian Soviet Republic established a revolutionary terror group, including Lenin's children, in accordance with the Bolshevik method of the Soviet Union. Up to 590 people were killed in the Red Terror.

In the aftermath of World War I, the Austro-Hungarian monarchy collapsed as Germany was defeated on the Western Front in 1918. On November 16, 1918, shortly after the abdication of Charles I of Austria-Hungary , immediately after the abdication of Charles I of Austria-Hungary, proclaimed the Hungarian Democratic Republic, with himself as its provisional president, and was inaugurated as president on January 11, 1919. On March 21, 1919, Károly was arrested by the new government of the Hungarian Soviet Republic, a communist party.