In 1453, Ottoman armies, under Sultan Mehmed II, conquered Constantinople. Over time, the classical republics were either conquered by empires or became ones themselves. By 1857 the army had conquered Kabyle Province, and pacified the country. In 1045, the Byzantine Empire conquered Bagratid Armenia. By then they had conquered most of the Russian principalities. However, they gradually conquered eastern and southern Britain. Pisa was never conquered by an army. Both areas had already been partially conquered, but remained difficult to govern. Catalonia was swiftly conquered by Nationalist troops. Then the Germanic races would have conquered the world. In AD700, Arabs conquered the island. Kraepelin thus finally conquered France via America. The Ottomans finally conquered the Serbian Despotate in 1459. They conquered Serbia easily, and Romania declared war. After years of war Agung finally conquered Surabaya.