The Ottoman Empire originated from Turkish tribes migrating to Asia Minor between 1000-1200 AD. They converted to Islam and eventually replaced Arabic-speakers as rulers of Islamic kingdoms. By the 1200s, the Ottomans had risen to power in Asia Minor as local lords competed for control in the region between the declining Byzantine and Seljuk Empires. The Ottomans expanded their empire through military conquest, capturing Constantinople in 1453 and much of the Balkans. In its peak under Suleyman the Magnificent from 1520-1566, the Ottoman Empire spanned Europe, Asia Minor, and parts of Arabia.