1. Emergence of organized fascism
Although Serbia/Yugoslavia was and still is a generally conservative environment, I think that it could be said fascism, in a strict definition, was a relatively small movement within it. Early on there were proto-fascist groups, like the conspiratorial Black Hand in the pre-1918 period, and various fascistic groups in the 1920’s (ORJUNA and others). The first more ideologically well-defined fascist groups in Serbia and Yugoslavia appeared in the first half of 1930’s (not counting the Croatian Ustašas, which are a separate issue). These smaller groups united in 1935, and this is how the Yugoslav National Movement Zbor (Rally) was formed, led by a Serbian lawyer Dimitrije Ljotić.