[1] Cserny learned to speak both German and Dalmatian and worked as a shoemaker until he served in the Austro-Hungarian Navy in the First World War.

[2] By December 1918, he had returned to Hungary and joined the sailor detachment of guards, protecting the headquarters of the communist party.

In addition to his role as a paramilitary commander, Cserny also oversaw some trials held in the revolutionary tribunals of the new Soviet Republic.

After an unsuccessful counter-revolutionary insurgency organized by a number of naval cadets occurred on June, Cserny urgently requested Béla Kun to rearm the group.

[6] After the Soviet Republic was defeated on 1 August 1919, the communist leadership fled shortly after, however, Cserny and many members of the Lenin Boys remained in Hungary and continued to fight.

[5] On 4 September 1919, deputy attorney general Albert Váry submitted an indictment to the Budapest Criminal Court against twenty-six defendants of the previous Soviet regime.