text: The kings from the Árpád dynasty appointed their officials from among the members of about 110 aristocratic clans. These aristocrats were descended either from native (that is, Magyar, Kabar, Pecheneg or Slavic) chiefs, or from foreign knights who had migrated to the country in the 11th and 12th centuries. The foreign knights had been trained in the Western European art of war, which contributed to the development of heavy cavalry in Hungary. Their descendants were labelled as newcomers for centuries, but intermarriage between natives and newcomers was not rare, which enabled their integration in two or three generations. The monarchs pursued an expansionist policy from the late 11th century. Ladislaus I () seized Slavoniathe plains between the river Drava and the Dinaric Alpsin the 1090s. His successor, Coloman (), was crowned king of Croatia in 1102. Both realms retained their own customs, and Hungarians rarely received land grants in Croatia. According to customary law, Croatians could not be obliged to cross the river Drava to fight in the royal army at their own expense.
  The earliest royal decrees authorized landowners to dispose freely of their private estates, but customary law prescribed that inherited lands could only be transferred with the consent of the owner's kinsmen who could potentially inherit them. From the early 12th century, only family lands traceable back to a grant made by Stephen I could be inherited by the deceased owner's distant relatives; other estates escheated to the Crown if their owner did not have offspring or brothers. Aristocratic families held their inherited domains in common for generations before the 13th century. Thereafter the division of inherited property became the standard practice. Even families descended from wealthy clans could become impoverished through the regular divisions of their estates.