To improve their defense capabilities for the future, they had to build forts, not only on the borders but also inside the country.
Mongoli so prevzeli oblast v skoraj celem kraljestvu, večjih utrjenih mest, kot so Fehérvár, Esztergom, Veszprém, Tihany, Győr, Pannonhalma, Moson, Sopron, Vasvár, Újhely, Zala, Léka, Pozsony - (današnja Bratislava), Nitra, Komárom, Fülek in Abaújvár pa niso mogli zavzeti.