The JBTZ trial or the JBTZ affair (Slovene: afera JBTZ), also known as the Ljubljana trial (ljubljanski proces) or the Trial against the Four (proces proti četverici) was a political trial held in a military court in Slovenia, then part of Yugoslavia in 1988. The defendants, Janez Janša, Ivan Borštner, David Tasić and Franci Zavrl, were sentenced to between six months and four years imprisonment for "betraying military secrets", after being involved in writing and publishing articles critical of the Yugoslav People's Army. The trial sparked great uproar in Slovenia, and was an important event for the organization and development of the democratic opposition in the republic. The Committee for the Defence of Human Rights was founded on the same day of the arrest, which is generally considere