Rubuta ci gaba ga wannan sakin layi - Yarjejeniyar Molotov-Ribbentrop na 1939 ya haifar da Yuni 1940 Soviet ultimatum
, mamayewa da kuma haɗa Bessarabia da 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.