Magajin Krum Khan Omurtag (r. 814-831) ya kulla yarjejeniyar zaman lafiya ta shekaru 30 da Rumawa, ta haka ya baiwa kasashen biyu damar dawo da tattalin arzikinsu da kudadensu bayan tashe-tashen hankula a cikin shekaru goma na farko na karni, inda suka kafa kan iyaka da Erkesia. mahara tsakanin Debeltos a kan Black Sea da kwarin Maritsa River a Kalugerovo.A yamma Bulgarians sun kasance suna iko da Belgrade a cikin 820s kuma iyakar arewa maso yamma tare da daular Frankish an daidaita su tare da tsakiyar Danube ta 827. A arewa maso gabas Omurtag ya yi yaƙi da Khazars tare da kogin Dnieper, wanda shine iyakar gabas. na Bulgaria .An gudanar da wani gagarumin gini a Pliska babban birnin kasar, wanda ya hada da gina wani katafaren fada, gidajen ibada na arna, wurin zama na masu mulki, kagara, kagara, babban ruwa, da wanka, musamman daga dutse da bulo.Omurtag ya fara a cikin 814 tsananta wa Kiristoci, musamman a kan fursunonin yaƙi na Byzantine da suka zauna a arewacin Danube.An ci gaba da faɗaɗa kudu da kudu maso yamma a ƙarƙashin magada Omurtag a ƙarƙashin jagorancin kavhan (wazirin farko) Isbul.