Siege of Constantinople

See Sieges of Constantinople for other sieges

The Siege of Constantinople in 626 by the Avars, aided by large numbers of allied Slavs and the Sassanid Persians, ended in a strategic victory for the Byzantines. The failure of the siege saved the Empire from collapse, and, combined with other victories achieved by Heraclius the previous year and in 627, enabled Byzantium to regain her territories and end the destructive Roman-Persian Wars by enforcing a favorable treaty with borders status quo c.590.

Background

In 602, Phocas overthrew Maurice, the incumbent Byzantine Emperor, and established a reign of terror and incompetence, leading the empire into anarchy.^[1] Laws were passed condemning Jews whilst religious and administrative mishandling left the Empire in a sorry state when the Sassanid King Khosrau II attacked, using the coup as a pretext for war. Initially the war went well for the Persians, until only Anatolia remained in Roman hands. Later, Phocas was overthrown by the son of the then Exarch of Carthage, Heraclius.^[1] A General of astounding energy yet limited experience, Heraclius immediately began undoing much of Phocas' damaging work that he had procured whilst Emperor.^[1] Yet despite his offensives into Mesopotamia (modern-day Iraq) Heraclius was unable to stop his Persian enemies from laying siege to his capital where from Chalcedon they were able to launch their attack.

Siege

Also assisting in the siege was a host of 80,000 Avars, bent on removing all Roman/Byzantine Imperial rule over Europe.^[2] The Persians had arrived in Chalcedon before Phocas was overthrown. However it was only when the Avars began moving forward heavy siege equipment towards the Theodosian Walls that a siege became clear.

Fortunately for the defenders, the soldiers of the capital numbered some 12,000 and consisted of cavalry - normally a well-trained arm of the Greco-Roman army of the time.^[3] Adding no small bonus was the Patriarch of Constantinople – whose cries for religious zeal among the peasantry around Constantinople was made ever more effective by the fact that they were facing heathens, at least in their eyes.^[3] Consequently, every assault became a doomed effort. When the Avar fleet and the Persian fleet were sunk in two different naval engagements, the attackers panicked and fled abandoning the siege - apparently under the belief that Divine intervention had won the day for Byzantium.^[3]

Aftermath

The loss came just after news had reached them of yet another Byzantine victory, where Theodore scored well against the Persian General Shahin.^[3] Following this, Heraclius led an invasion into Mesopotamia once again, defeating another Persian army at Nineveh. Afterwards, he marched on to Ctesiphon where anarchy reigned – allowing Heraclius to extract ever more favorable terms as one Persian King was overthrown by another. Eventually, the Persians were obliged to withdraw all armed forces and return Egypt, the Levant and whatever Imperial territories of Mesopotamia and Armenia were in Roman hands at the time of an earlier peace treaty in c. 595. The war over, neither the Persians nor the Byzantines would cross swords again until the Arab-Islamic invasion broke the power of both Empires.

See also

• Bonus
• Byzantine-Sassanid Wars
• Byzantine-Arab Wars
• Siege of Constantinople (674)

References

Further Reading

• Howard-Johnston, James, 'The siege of Constantinople in 626', in Constantinople and its Hinterland. Papers from the Twenty-seventh Spring Symposium of Byzantine Studies, Oxford, April 1993, ed. Cyril Mango and Gilbert Dagron, Ashgate Publishing (1995), pp. 131-42
• Harris, Jonathan, Constantinople: Capital of Byzantium. Hambledon/Continuum (2007). ISBN: 978 1847251794
• The Oxford Dictionary of Byzantium, Oxford University Press (1991) ISBN: 0195046528
• Warren Treadgold, A History of the Byzantine State and Society, Stanford University Press (1997) ISBN: 08047 26302