Khan Tervel was a notable ruler of the First Bulgarian Empire, reigning from 701 to 718 AD. He is best known for his military successes against the Byzantine Empire, particularly during the conflicts that arose after the fall of the Sassanian Empire. Tervel's leadership helped to solidify Bulgaria's power in the region and establish its influence over the Balkans. Under Khan Tervel, Bulgaria also experienced significant internal development, including the strengthening of its administrative structures. His reign is often credited with fostering a sense of national identity among the Bulgarian people, laying the groundwork for future cultural and political advancements in the Bulgarian state.