"Occupation of Eastern Serbia" . . "Bulgarian occupied Serbia" . "Bulgarian occupation of Serbia (World War I)" . "Bulgarian occupation of Vardar Macedonia" . . "occupied the region" . "Bulgarian occupation of Southern Serbia" . . "Bulgarian-occupied southeastern Serbia" . "territory occupied by the Bulgarians" . . "Bulgarian" . . . . . . "occupied" . . . "Bulgarian-occupied Serbia" . . "Bulgarian occupation of Serbia (World War I)" . "Macedonia" . "Bulgarian-Occupied Serbia" . . "Bulgarian Occupied Serbia" . "Bulgarian occupational zone" . . . "Bulgarian occupation of Serbia" . . "Bulgarian zone of occupation" . . "World War I Bulgarian occupation" . "Bulgaria" . . "Bulgarian occupation zone of Serbia" . "World War I Bulgarian occupation of Kingdom of Serbia" . "Eastern Serbia" . . "Occupied by Bulgaria" . "Bulgarian occupation" . . . . . "Occupation of Serbian Macedonia" . "Bulgarian occupied zone of Serbia" . . "Military Region of Macedonia" . "invaded southern Serbia" . . "Military Inspection Area of Macedonia" . "Bulgarian occupation zone" .