In 1431, the population was about 22,800 including 7146 persons qualified to bear arms, 381 secular and regular priests, 744 Jews and non-citizens. As an emerging regional power, however Nuremberg soon came into conflict with the old dynasty, the former burgraves, who had brought large areas of the region around the city under their control as the Margrave of Brandenburg-Kulmbach and Elector of Brandenburg. This conflict came to a head in the First Margrave War in 1449–50, when Albert III "Achilles", Elector of Brandenburg, tried in vain to restore his former rights over the city. The Hussite Wars, recurrence of the Black Death in 1437 and the First Margrave War had reduced the city's population to 20,800 by 1450.