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The Praetorian Guard and Varangian Guard: The History of the Elite Soldiers Who Protected the Roman and Byzantine Emperors
A member of Julius Caesar’s extended family, Gaius Marius, was the military visionary who had restructured the legions and extended the privileges of land ownership and citizenship to legionaries on condition of successful completion of a fixed term of service. Marius made the army more professional and helped propel Rome’s expansion, but those same reforms eventually made the legions fiercely loyal to their individual generals rather than the state, which would make Caesar’s seizure of power possible and bring about the dawn of the Roman Empire.
Naturally, having military units who were only loyal to individuals also made an imperial bodyguard possible, and few institutions in the long and turbulent history of the Roman Empire characterized the internal dynamics – and potential problems – of the empire’s structure like the Praetorian Guard. The Praetorian Guard was instituted by Augustus as a personal bodyguard for Rome’s most powerful leaders, but it eventually evolved into a kingmaking force that could elevate emperors, manipulate politics, and ultimately weaken the very system it served protect. In that sense, the Praetorian Guard reflected Rome’s transition from a republic that prided itself on civic virtue and suspicion of tyranny into an autocratic empire where the concentration of power in a single individual required both protection and coercion on a scale that didn’t exist before.
Augustus, a consummate politician, understood he was walking a fine line between republican tradition and total power, so to secure his rule without appearing overtly tyrannical, he stationed the Praetorian Guard in a single fortified camp, the Castra Praetoria, just outside Rome, which allowed it to become more organized but also one capable of wielding its own power. This factor would prove decisive during several moments of crisis, when the question of imperial succession often hinged less on legal legitimacy than on the physical security guaranteed by the Guard. The assassination of emperors, once a shocking aberration, gradually became a common means of political change, and the Praetorian Guard frequently stood at the center of such events, either as conspirators or as the ones who determined the outcome in their aftermath.
The Byzantine Empire was the heir to two great cultures that cradled and nurtured European Greece and Rome. Constantinople, now called Istanbul, became a center of power, culture, trade, and technology poised on the edges of Europe and Asia, and its influence was felt not only throughout Europe but the Middle East, Africa, Central Asia, and the Far East. It owed its success in no small part to its military, which, in contrast to the feudal armies of Western Europe and the tribally based forces of the Middle East, operated with a high level of discipline, strategic prowess, efficiency, and organization.
At the same time, the Byzantines relied heavily on mercenaries, and the most famous of the foreign units was without question the Varangian Guard. The Varangians came from the land in Eastern Europe known in the Middle Ages as Rus, which is now part of modern Russia and Ukraine. They were descendants of Viking warriors from Sweden who came to rule the waterways and population of Russia. Varangian mercenaries were fighting for the Byzantines by the 10th century, and in 988 they formed a permanent elite guard for the emperor.
The Varangian Guard’s primary duty was always to protect the emperor, and inevitably, the Varangians became a political force, taking part in the numerous palace coups. They displayed a fierce devotion not necessarily to the emperor but to the throne itself. They were amongst the fiercest and most feared military units in Christendom, which made the unit an attractive station for many soldiers of fortune came to Constantinople hoping to pursue lucrative military careers in the service of the Byzantine emperors.
Naturally, having military units who were only loyal to individuals also made an imperial bodyguard possible, and few institutions in the long and turbulent history of the Roman Empire characterized the internal dynamics – and potential problems – of the empire’s structure like the Praetorian Guard. The Praetorian Guard was instituted by Augustus as a personal bodyguard for Rome’s most powerful leaders, but it eventually evolved into a kingmaking force that could elevate emperors, manipulate politics, and ultimately weaken the very system it served protect. In that sense, the Praetorian Guard reflected Rome’s transition from a republic that prided itself on civic virtue and suspicion of tyranny into an autocratic empire where the concentration of power in a single individual required both protection and coercion on a scale that didn’t exist before.
Augustus, a consummate politician, understood he was walking a fine line between republican tradition and total power, so to secure his rule without appearing overtly tyrannical, he stationed the Praetorian Guard in a single fortified camp, the Castra Praetoria, just outside Rome, which allowed it to become more organized but also one capable of wielding its own power. This factor would prove decisive during several moments of crisis, when the question of imperial succession often hinged less on legal legitimacy than on the physical security guaranteed by the Guard. The assassination of emperors, once a shocking aberration, gradually became a common means of political change, and the Praetorian Guard frequently stood at the center of such events, either as conspirators or as the ones who determined the outcome in their aftermath.
The Byzantine Empire was the heir to two great cultures that cradled and nurtured European Greece and Rome. Constantinople, now called Istanbul, became a center of power, culture, trade, and technology poised on the edges of Europe and Asia, and its influence was felt not only throughout Europe but the Middle East, Africa, Central Asia, and the Far East. It owed its success in no small part to its military, which, in contrast to the feudal armies of Western Europe and the tribally based forces of the Middle East, operated with a high level of discipline, strategic prowess, efficiency, and organization.
At the same time, the Byzantines relied heavily on mercenaries, and the most famous of the foreign units was without question the Varangian Guard. The Varangians came from the land in Eastern Europe known in the Middle Ages as Rus, which is now part of modern Russia and Ukraine. They were descendants of Viking warriors from Sweden who came to rule the waterways and population of Russia. Varangian mercenaries were fighting for the Byzantines by the 10th century, and in 988 they formed a permanent elite guard for the emperor.
The Varangian Guard’s primary duty was always to protect the emperor, and inevitably, the Varangians became a political force, taking part in the numerous palace coups. They displayed a fierce devotion not necessarily to the emperor but to the throne itself. They were amongst the fiercest and most feared military units in Christendom, which made the unit an attractive station for many soldiers of fortune came to Constantinople hoping to pursue lucrative military careers in the service of the Byzantine emperors.
125 pages, Kindle Edition
Published October 9, 2026
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