May I suggest the addidion of these two ruling authorities to the Serbian catalough? Thanks.
German Occupation (1941-1944)
State Union of Serbia and Montenegro (SCG) (2003-2006)
Souces:
https://en.wikipedia.org/wiki/History_of_Serbia#Serbia_in_World_War_II_(1941%E2%80%931944)
https://en.wikipedia.org/wiki/History_of_Serbia#Serbia_and_Montenegro_(1992%E2%80%932006)