Territorial expansion, Bulgaria doubles in size

Expansion of the First Bulgarian Empire. ©HistoryMaps

803 Jan 1

Territorial expansion, Bulgaria doubles in size

Transylvania, Romania

During the reign of Krum (r. 803–814) Bulgaria doubled in size and expanded to the south, west and north, occupying the vast lands along the middle Danube and Transylvania, becoming European medieval great power during the 9th and 10th century along with the Byzantine and Frankish Empires.

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Territorial expansion, Bulgaria doubles in size