Country merger dates in the creation of Yugoslavia, color-coded:
25 November 1918 —   Banat, Bačka and Baranja into the   Kingdom of Serbia
26 November 1918 —   Kingdom of Montenegro into the   Kingdom of Serbia
1 December 1918 —   State of Slovenes, Croats and Serbs with the   Kingdom of Serbia
Own work derived from File:Srbsko 1919.svg. Reference work: hr:Datoteka:Država SHS.PNG.
User:Vipz; User:M.Bitton (arrows), User:Jaspe (base map).