وقد أصبح حُكام سيبريا (Serbia)، ووالاتشيا (Wallachia)، ومولدافيا (Moldavia)، وبلغاريا (Bulgaria) من أتباعه.
He also made several attempts to expand his suzerainty over the rulers of Bosnia, Moldavia, Wallachia, and parts of Bulgaria and Serbia.