Byzantine–Bulgarian War of Simeon

Timeline

1. 894Constantinople · ByzantineByzantine Emperor Leo VI imprisoned Bulgarian merchants and sheltered Bulgarian tax collectors who had fled to Byzantium; Tsar Simeon I used this as grounds to declare war on Byzantium, breaking the long-standing peace in the Balkans.
2. 894–896Thrace · ThraceSimeon led his army south into Byzantine Thrace, and Byzantium suffered an initial defeat; the two sides then fought protracted campaigns, with Byzantium bringing in the Magyars and Pechenegs to attack Bulgaria from two sides, and the tide of war repeatedly shifting.
3. 913Constantinople · ByzantineSimeon's forces advanced to the walls of Constantinople, forcing the young Emperor Constantine VII to negotiate with him; Simeon received the title 'Emperor of the Bulgarians and Romans,' and Bulgarian power reached its zenith.