(c. 895), due to their involvement in the 894–896 Bulgaro-Byzantine war, Hungarians in Etelköz were attacked by Bulgaria and then by their old enemies the Pechenegs. The Bulgarians won the decisive battle of Southern Buh. It is uncertain whether or not those conflicts contributed to the Hungarian departure from Etelköz. From the upper Tisza region of the Carpathian Basin, the Hungarians intensified their looting raids across continental Europe. In 900, they moved from the upper Tisza river to Transdanubia, which later became the core of the arising Hungarian state. By 902, the borders were pushed to the South-Moravian Carpathians and the Principality of Moravia collapsed. At the time of the Hungarian migration, the land was inhabited only by a sparse population of Slavs, numbering about 200,000, who were either assimilated or enslaved by the Hungarians. Archaeological findings (e.g. in the Polish city of Przemyśl) suggest that many Hungarians remained to the north of the Carpathians after 895/896. There is also a consistent Hungarian population in Transylvania, the Székelys, who comprise 40% of the Hungarians in Romania. The Székely people's origin, and in particular the time of their settlement in Transylvania, is a matter of historical controversy. After 900 In 907, the Hungarians destroyed a Bavarian army in the Battle of Pressburg and laid the territories of present-day Germany, France, and Italy open to Hungarian raids, which were fast and devastating. The Hungarians defeated the Imperial Army of Louis the Child, son of Arnulf of Carinthia and last legitimate descendant of the German branch of the house of Charlemagne, near Augsburg in 910. From 917 to 925, Hungarians raided through Basle, Alsace, Burgundy, Saxony, and Provence. Hungarian expansion was checked at the Battle of Lechfeld in 955, ending their raids against Western Europe, but raids on the Balkan Peninsula continued until 970. The Pope approved Hungarian settlement in the area when their leaders converted to Christianity, and Stephen I (Szent István, or Saint Stephen) was crowned King of Hungary in 1001. The century between the arrival of the Hungarians from the eastern European plains and the consolidation of the Kingdom of Hungary in 1001 was dominated by pillaging campaigns across Europe, from Dania (Denmark) to the Iberian Peninsula (contemporary Spain and Portugal). After the acceptance of the nation into Christian Europe under Stephen I, Hungary served as a bulwark against further invasions from the east and south, especially by the Turks.