Islam was first introduced to the Balkans on a large scale by the Ottomans in the mid-to-late 15th century who gained control of most of Bosnia in 1463, and seized Herzegovina in the 1480s. Over the next century, the Bosnians – composed of dualists and Slavic tribes living in the Bosnian kingdom under the name of Bošnjani[5] – embraced Islam in great numbers under Ottoman rule. During the Ottoman era the name Bošnjanin was definitely transformed into the current Bošnjak ('Bosniak'), with the suffix -ak replacing the traditional -anin.