Battle of Belasitsa (1014)
The Battle of Belasitsa (or Kleidion) fought in 1014 was the culmination of a three decades long struggle between the Byzantine Emperor Basil II also called the Bulgar-slayer and the Bulgarian Emperor Samuil. Basil II decisively defeated the Bulgarians and captured the entire Bulgarian army of 14,000 men. Basil had all Bulgarian captives blinded except for one men in every hundred who was left with one eye and send them back to Bulgaria. At sight of his army Samuil allegedly suffered a heart attack and died two days later.