The Serbian True Orthodox Church originated in the 1990s, when three Serb monks returned from the Esphigmenou Monastery on Mount Athos, a stronghold of Greek Old Calendarists.
[1] The movement follows the Old Calendarist doctrines of rejecting all perceived attempts at reform of the church, particularly ecumenism and other relations with non-Orthodox Christians, baptism by aspersion and acceptance of the Revised Julian Calendar.
[4] In 2007, the sisterhood of Stjenik Monastery [sr; fr] near Čačak refused submission to the Serbian Orthodox Church after it signed the Ecumenic Charter agreeing to hold a great Christian Communion in Niš in 2013.
[2][1] In August 2014, the STOC organized the second "Saint Lazar Orthodox Youth Camp" on the Kučaj mountains, that gathered a number of 12- to 18-year-olds.
They came to the attention of the Serbian public after it was revealed that the children were taught how to operate airsoft replicas of Kalashnikov rifles, among other military skills.