Rubuta ci gaba don wannan sakin layi - Bulgaria ta shiga cikin mamayewar Axis na Yugoslavia da Girka ta hanyar barin sojojin Jamus su kai hari daga yankinta kuma suka aika da sojoji zuwa Girka a ranar 20 ga Afrilu. A matsayin lada, kasashen Axis sun ba Bulgaria damar mamaye sassan kasashen biyu - kudanci da kudu maso gabashin Yugoslavia (Vardar Banovina) da arewa maso gabashin Girka (sassan Macedonia da Thrace na Girka). Sojojin Bulgaria a cikin waɗannan yankuna sun shafe shekaru masu zuwa suna yaƙi da ƙungiyoyi daban-daban na ƙasa da ƙungiyoyin juriya. Duk da matsin lamba na Jamus, Bulgaria ba ta shiga cikin mamayewar Axis na Tarayyar Soviet ba kuma a zahiri ba ta taɓa yin yaƙi da Tarayyar Soviet ba. Rundunar Sojan Ruwa na Bulgarian
duk da haka ya shiga cikin rikice-rikice da yawa tare da Soviet Black Sea Fleet, wanda ya kai farmaki ga jiragen ruwa na Bulgaria.