Tsawon mulkin Ivan Alexander ana daukarsa a matsayin lokacin rikon kwarya a tarihin daular Bulgaria .Ivan Alexander ya fara mulkinsa ne ta hanyar magance matsalolin cikin gida da barazanar waje daga makwabtan Bulgeriya, daular Rumawa da Sabiya, tare da jagorantar daularsa zuwa wani lokaci na farfado da tattalin arziki da farfado da al'adu da addini.Duk da haka, daga baya sarkin ya kasa tinkarar hare-haren da dakarun Ottoman ke yi, da mamayar Hungary daga arewa maso yamma da kuma Mutuwar Bakar fata.A wani mummunan yunƙuri na yaƙi da waɗannan matsalolin, ya raba ƙasar tsakanin 'ya'yansa biyu, don haka ya tilasta mata fuskantar yakin daular Usmaniyya da ke kusa da ta raunana kuma ta rabu.