 Vanhu veJasz vakauya kuUmambo hweHungary, pamwe chete neCumania vanhu apo nyika dzavo kumabvazuva, mune dzimwe muMoldova yakazotevera ona Iași neJaszvasar dzakapindirwa neHumambo hweMongol pakati pezana ramakore rechi13. Vakagamuchirwa namambo weHungary, Béla IV Árpád, uyo aikarira kuti vaJaszs vaizobetsera mukudzivisa kupinda kwevaMongol navaTatar. Nokukurumidza pashure pokupinda kwavo, ukama hwakaipa zvikuru pakati pevakuru veHungary nemadzinza eCumania-Jasz, ayo akabva asiya nyika. Pashure pokuguma kwokupinda kwevaMongol-vaTatar vakadzoka ndokugara muchikamu chepakati chePannonian Plain, pedyo nenzizi dzeZagyva neTarna. 