How Greek fire and diplomacy ended the Rus'–Byzantine war of the tenth century
In 941, the Rus' launched a surprise naval assault on a seemingly defenseless Constantinople. They were met with a terrifying, secret weapon that turned the tide of the conflict. What followed was a brutal campaign of pillaging, a decisive naval defeat, and a complex treaty that reshaped regional power.
The conflict began in May 941 when Igor of Kiev and his Pecheneg allies invaded Bithynia. The Rus' had correctly identified that Constantinople was vulnerable, as the Byzantine fleet was engaged against Arab forces and the Imperial army was stationed on the eastern borders. However, Bulgarian tsar Peter I alerted the Byzantines to the impending attack, allowing the capital to prepare.
Lecapenus organized a defense using 15 retired ships retrofitted with tubes for Greek fire. When the Rus' fleet surrounded these vessels, the Byzantines unleashed the flames. Liudprand of Cremona recorded the horror, noting that the invaders preferred drowning to burning. Those who survived the fire were often captured and beheaded. Despite this naval success, the Rus' continued to pillage the hinterland, committing atrocities such as crucifying captives or using them for target practice.
By September 941, Byzantine generals John Kourkouas and Bardas Phokas returned to the capital, forcing the Rus' to retreat toward Thrace. The Byzantine navy intercepted them, reportedly destroying their entire fleet. Igor returned in 944 with an even larger force, but the Byzantines chose diplomacy over further bloodshed. The resulting Rus'–Byzantine Treaty of 945 established trade regulations, restricted Rus' merchant movements, and assigned Crimean territories to the Byzantine Empire.
Historians offer varying interpretations of the outcome. Shikanov argues the treaty was a success for Byzantium, as it imposed strict conditions on trade and required the Rus' to protect Byzantine interests from nomads. Conversely, Vladimir Pashuto suggests the campaigns were driven by profit rather than conquest, viewing the peace as mutually beneficial for the trade interests of both nations.
Source: Rus'–Byzantine War (941–944)
