Srem

Srem is a historical region in modern Serbia, known as the Srem region. At different times during the Middle Ages, the territory was subject to the influence and control of various states, including the First Bulgarian Empire. Under the Bulgarian rulers Prince Boris I and Tsar Simeon the Great, Srem was under Bulgarian rule.
Srem lies between the Sava and Danube rivers, giving it strategic importance. The area mattered to the Bulgarian Empire both as a frontier zone and as an important economic and cultural centre. Control of Srem gave the Bulgarians access to major trade routes and opportunities to strengthen their position in the Balkans.
During the First Bulgarian Empire, Srem was frequently the scene of conflicts and rivalry with the Byzantine Empire and other neighbouring powers. Despite the brevity of Bulgarian rule in the region, Bulgarian language and culture left lasting traces among the local population.
Today, Srem remains a significant historical and geographical region, preserving the memory of the complex historical connections between the Bulgarian state and the Balkan Peninsula. Many of its old fortresses, monasteries and archaeological sites bear witness to these interactions and can be viewed as part of the shared cultural heritage of Bulgaria and Serbia.