Kammala wannan jumla: Yarjejeniyar Molotov-Ribbentrop ta 1939 ta haifar da
Yuni 1940 Ƙarshen Soviet, mamayewa da kuma haɗuwa da Bessarabia ta Tarayyar Soviet. Ko da yake an yarda da 'yan tsiraru a ƙarƙashin mulkin Soviet, 'yan Bulgarian na gida sun rasa wasu halaye na al'adunsu.