The Magyar defeat at the Lech proved absolutely decisive for the shape of Europe. The retreating Magyar army tried to attack the Bohemian Slavs but were again defeated, headed back along the Danube and then stuck there. Germans and Magyars found a demarcation line east of Vienna and the two groups clicked together like a seatbelt, separating the northern Slavs (Bohemians, Moravians, Poles) from the southern Slavs (Slovenes, Croats, Serbs), and inventing what became Austria and Hungary.
