In France, castellans (known in French as châtelains) who governed castellanies without a resident count, acquired considerable powers such that the position became hereditary. By the tenth century, the fragmentation of power had become so widespread that in Mâcon, for instance, where the castellany was the basic unit of governance, there was no effective administrative level above it, so that the counts of Mâcon were largely ignored by their subordinate castellans from about 980 to 1030. In the 12th century "châtelains" had become "lords" in their own right and were able to expand their territories to include weaker castellanies. Thus the castellan of Beaujeu was able to take over lands in Lyons, or the castellan of Uxelles annexed first Briançon, then Sennecey-le-Grand and finally l'Épervière.