An yi la'akari da mulkin Smilec a matsayin tsayin mulkin Mongol a Bulgaria .Duk da haka, ana iya ci gaba da kai hare-haren Mongol, kamar yadda ya faru a shekara ta 1297 da 1298. Tun da waɗannan hare-haren sun ƙwace sassan Thrace (sa'an nan gaba ɗaya a hannun Byzantine), wataƙila Bulgaria ba ta cikin manufarsu.A haƙiƙa, duk da manufofin Nogai na goyon bayan Byzantine, Smilec ya shiga cikin yaƙin da bai yi nasara ba da daular Rumawa a farkon mulkinsa.Game da 1296/1297 Smilec ya auri 'yarsa Theodora zuwa nan gaba Sarkin Serbia Stefan Uroš III Dečanski, kuma wannan ƙungiyar ta haifar da Sarkin Serbia kuma daga baya sarki Stefan Uroš IV Dušan.A cikin 1298 Smilec ya ɓace daga shafukan tarihi, a fili bayan farkon mamayewar Chaka.Wataƙila Chaka ne ya kashe shi ko kuma ya mutu saboda dalilai na halitta yayin da abokan gaba suka yi gaba da shi.Smilec ya gaje shi da ɗansa Ivan II.