These cities had a duty of socage. Initially the peasants succeeded in getting the lords to waiver all duties, socage and interest. The baronies not converted became baronies of free socage, a dignity title. Other forms of socage were still in use. Initially peasants kept their land, but had to continue performing socage and rent payments. Forms no longer used include socage and burgage. Grant in free socage, subject to rents etc. In the Mongol Empire, the darkhans were exempted from taxation, socage and requisitioning. The most important difference between the military and socage tenures was the mode of descent. Amount and length of socage now was regulated and limited. Petty serjeanty came to be treated as "socage in effect". Taxes such as socage duty, tithes and local customs duties were abolished. Wool weavers and tanners had to pay "socage", a special kind of tax. Immediately below the level of free socage was that of the villeinage ("roture"). The Wettins fostered Weimar by abolishing socage and granting privileges to the citizens.