It's the year 680. Byzantium marches with full strength to eradicate “a foul tribe” which has entered their borders fleeing an even more powerful steppe tribe behind them. What could go wrong?
A map showing the establishment of the First Bulgarian Empire
A more general map showing the major migrations of the 6th century
A map showing Slavic movements in the 6th century
A map showing the migration of the various groups of Proto-Bulgarians following the collapse of Old Great Bulgaria