From the Székelys, continuing warfare demanded increased military service, and the royal administration imposed special taxes on them. Although the leaders of the Székely community were exempted from taxation in 1554, but all the foot soldiers continued to be taxed, resulting in a double burden of military and monetary obligations for them. In 1562 many Székelys took up arms against John II Sigismund, but they were defeated. The Saxon towns continued to develop even in the years of upheaval. Their population, however, increased slowly, mainly as a consequence of the Saxons' traditional desire for segregation: even Hungarian craftsmen and merchants were prohibited from settling in their towns.