Battle of Kleidion

The Battle of Kleidion was a Byzantine victory over the Bulgarian Empire in 1014, fought near Kleidion during the long Byzantine–Bulgarian wars.

Basil II: Basil II was Byzantine emperor from 976 to 1025, known for expanding and consolidating imperial power. His campaign against Bulgaria culminated in victory at Kleidion.
Bulgarian Empire: The Bulgarian Empire was a medieval state that dominated parts of southeastern Europe in several periods. It was the polity whose army Basil II defeated at Kleidion.
Fall of the First Bulgarian Empire: The fall of the First Bulgarian Empire was its incorporation into the Byzantine Empire, completed in 1018. Kleidion accelerated the collapse that ended four years later.
John Skylitzes: John Skylitzes was an eleventh-century Byzantine historian who wrote a chronicle of emperors and their reigns. His chronicle preserves a major narrative of Basil II's Bulgarian campaigns.
Strymon River: The Strymon is a river flowing through Bulgaria and Greece into the Aegean Sea. Byzantine forces used its valley to approach the Bulgarian positions.
Byzantine Empire: The Byzantine Empire was the medieval continuation of the Roman Empire centered on Constantinople. It waged the campaign that ended in the victory at Kleidion.
Basil II's Bulgarian campaign: Basil II's Bulgarian campaign was a decades-long effort to defeat and annex the Bulgarian Empire. The victory at Kleidion became its defining military success.
Byzantine historiography: Byzantine historiography is the writing and study of historical works produced in the Byzantine world. It provides the principal surviving tradition for the battle's narrative.
Battle of Belasitsa: The Battle of Belasitsa was the decisive engagement within the 1014 campaign, fought in the Belasitsa Mountains. It names the mountain fighting associated with the rout at Kleidion.
Byzantine conquest of Bulgaria: The Byzantine conquest of Bulgaria was the process by which Byzantium absorbed the Bulgarian Empire in the early eleventh century. Kleidion opened the final phase of that conquest.

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