 Ramba uchinyora ndima iyi - Mukutonga kwake kwenguva pfupi mambo weByzantium Alexander r. 912913 yakakonzera kunetsana namambo weBulgaria Simeon I r. 893927. Simeon I, uyo akanga ave achida kwenguva refu kuwana zita roumambo, akatora mukana wacho kuti arwe hondo. Sezvo Umambo hweByzantium hwakanga hwaparara pashure pokufa kwaAlexander muna June 913, vaBulgaria vakasvika kuConstantinople vasina kumbokundwa uye vakamanikidza mwana Constantine VII mambo weRoma kuti ave mutongi. 913959 kuti azive Simeon I samambo muchiBulgaria, Tsar. Zvichitevera kudengenyeka kwemuzinda muna 914, mubati mutsva weByzantium akabvisa zvibvumirano kuvaBulgaria ndokushevedza uto rose, kusanganisira mauto muAsia Minor, kuti agadzirise kutyisidzira kweBulgaria kamwechete uye zvachose. Muhondo inokosha yeAchelousmuna 917 mauto eByzantium akaparadzwa chose chose, achisiya vaBulgaria vachitarisira Balkan. Hondo dzavo dzegore negore dzakasvika kumasvingo eConstantinople neIsthmus yeKorinde. Kuedza kwese kwakazotevera kutarisana neuto reBulgaria kuKatasyrtai, Aquae Calidae nePegae kwakaguma nekukundwa. 