Causes and background
The formal reason for Yaroslav was the murder of a “noble Scythian” in the market of Constantinople.
In addition, there is a version according to which the cause of the conflict was the desire of the Kyiv princes and ministers of the Christian religion to get out of subordination to the Byzantine patriarchs – according to the official imperial doctrine, the Byzantine emperor was the supreme ruler over all peoples who adopted Christianity from Byzantium.[1]https://sergeytsvetkov.livejournal.com/63558.html
Chronology and detailed description of events
Events before the start of the conflict
«they cut down a forest somewhere in the depths of their country, cut out boats, small and larger, and gradually, having done everything in secret, gathered a large fleet and were ready to move on Mikhail».
It is probable that the military training was preceded by negotiations (presumably in 1041.), which ended unsuccessfully for the Russian side. We do not know exactly what requirements Yaroslav presented to Michael IV. It is only clear that it was about some form of political and ecclesiastical independence of Russia from Byzantium. Psellos in this regard writes the following about the Rus:
«This barbarian tribe has always harbored a fierce and rabid hatred of the hegemony of the Romans; at every opportunity, inventing one or the other accusation, they created a pretext for war with us».
In the summer of 1042 an embassy of Yaroslav the Wise arrived in the Byzantine capital of Constantinople. However, instead of negotiating with the new emperor, the Russian ambassadors had to deal with the entourage of Empress Zoe – the same people who failed last year’s negotiations.
The situation in Constantinople was tense with the expectation of an imminent war. The urban common people did not hide their hostility towards the northern “barbarians”, and one day these sentiments turned into a mass brawl with Russian merchants who traded in the Constantinople market. According to the records of Skylitsa, the reason for the subsequent war was the murder of a noble Russian merchant (“noble Scythian”) in the market of Constantinople. Emperor Constantine apologized, but it was not accepted. Negotiations were interrupted, and the Russian embassy, irritated by the reception, left the capital of Byzantium.

Konstantin Monomakh, attempted to disband the Varangian-Russian corps in preparation for the upcoming clash with the Rus.
“The Scythians [Rus], who were in the capital,,” writes John Skilitsa, , were dispersed in the provinces. This was done in order to destroy the possibility of any war movement or attempt uprising from within of city.
The manifestation of this was the desire of the famous Viking Harald the Severe to return to his homeland. However, Constantine not only refuses, but, according to the sagas, throws Harald into prison. Tom manages to escape to his homeland through Rus, where his friend Yaroslav reigned.
In some places, the government initiative was picked up and developed in its own way. For example, on Athos, stone buildings in the bay and boats that belonged to the monastery of Russian monks were destroyed.
The number of Russian troops
The size of the Russian army and navy can only be determined approximately. Under the command of the voivode Ivan Tvorimirich, there was a princely squad, the Kyiv “regiment” led by the thousandth Vyshata and a large detachment of mercenaries recruited in the Slavic Pomorye (“Varangian” coast of the Baltic). The Chronicle tells about “many warriors”. Michael Psellos writes that “an incalculable, so to speak, number of Russian ships” approached Constantinople. According to Skylitsa, the Russian army numbered up to 100,000 soldiers. Other figures are called by the Byzantine historian of the 11th cent. Michael Attaliat: 20,000 warriors on 400 ships. The information can be corrected as follows.

Preparations of Byzantium to defend from the Rus
This immediately increased the size of the capital’s fleet to several dozen ships. It is known that only one general of the coastal province of Kivirreotov, located in the southwestern part of Asia Minor, brought a squadron of eleven fire-bearing warships to Constantinople. Part of the fleet was moved forward to guard the distant approaches to the straits.
In June 1043 Prince Vladimir’s fleet crossed the Bosporus and landed in one of the bays of Propontis, not far from Constantinople. According to Psellos, the Russians entered into negotiations, requesting 1,000 coins per ship. According to Skylitsa, Emperor Konstantin Monomakh was the first to start negotiations, which did not lead to anything, since the Russians requested 3 “litry” (almost 1 kg) of gold per warrior. On the same day, Constantine IX ordered all available naval forces to be prepared for battle – not only battle triremes, but also cargo ships on which siphons with “liquid fire” were installed. Troops of cavalry were sent out along the coast. Closer to the night, the emperor solemnly announced to the Rus that tomorrow he intended to give them a naval battle.
Battle
Constantine ordered Master Basil Theodorokan to leave the bay with three dromon warships in order to draw the enemy into battle.
According to Skylitsa, Vasily Theodorokan burned 7 Russian boats, sank 3 together with people, and captured one by jumping into it with a weapon in his hands and engaging in battle with the Russians who were there, several of whom were killed by him, while others rushed into the water. Seeing the successful actions of Vasily, Constantine signaled the advance of the entire Roman fleet. Fire-bearing triremes, surrounded by smaller ships, escaped from the Golden Horn Bay and rushed to the Rus. The latter, obviously, were discouraged by the unexpectedly large number of the Roman squadron. Psellos writes that “when the triremes crossed the sea and ended up at the very boats, the barbarian system crumbled, the chain broke, but some ships dared to stay in place …”.

(art. José Daniel Cabrera Peña)
In the gathering twilight, the bulk of the Russian boats left the Bosporus Strait for the Black Sea, probably hoping to hide from pursuit in shallow coastal waters. Unfortunately, just at that time, a strong east wind rose, which, according to Psellos, literally swept the Russian fleet:
“wind furrowed the sea with waves and drove waves of water against the barbarians. Some ships were immediately covered by the rearing waves, while others were dragged along the sea for a long time and then thrown onto the rocks and onto the steep coast; our triremes set off in pursuit of some of them, they launched some boats under the water along with the crew, and other warriors from the triremes made a hole and delivered half-submerged to the nearest shore “
“And then they gave the barbarians a true bloodletting,” concludes his story, Psell, “it seemed as if a stream of blood poured out of the rivers colored the sea.”.
Russian chronicles tell that the wind “broke” the “prince’s ship”, but Ivan Tvorimirich, who came to the rescue of the voivode, saved Vladimir by taking him into his boat. The extent of the disaster that had befallen the Rus became clear only in the morning, when the storm subsided. Several thousand warriors, who had lost their weapons and armor, accumulated on the shore, but there was nothing to help them, since all the surviving boats were overcrowded.
Tysyatsky-voivode Vyshata voluntarily volunteered to go ashore and lead a detachment of the doomed. The Chronicle so preserved his heroic words:
“If I live, then with them, if I perish, then with the retinue”.
Vyshata managed to bring his people to the mouth of the Varna River (in Bulgaria), but here the Russ were attacked by the strategist of Paristrion Katakalon Kekavmen. Most of the 6,000 Russian soldiers laid down their heads in a bloody massacre, and the 800 captured people, among whom was Vyshata, were sent to Constantinople, where they were subjected to the execution prescribed for state rebels: some had their eyes gouged out, others were cut off their right hand. Bloodied limbs were hung on the walls of Constantinople.
Nevertheless, many Russian boats managed to escape and even subsequently defeated the Byzantine squadron sent after them – having lured half of the enemy ships pursuing them into one of the bays, the Rus suddenly appeared behind them. Almost half of the Byzantine squadron fled. During a fierce battle, the Russians captured several enemy ships, killing everyone who was there. Vladimir and the remnants of his fleet successfully reached Kyiv.
The conflict finally ended with the signing of a peace treaty in 1046. As a sign of making peace with Russia, Konstantin approved marriage his daughter from his first marriage (or, as some authors suggest, another close relative) to son Yaroslav, Vsevolod. Born in 1053 from this marriage, the son Vladimir received from his parents the nickname after his grandfather – Vladimir Monomakh. Also released the governor Vyshata and other russian captivities.
Results and accomplishment
- The campaign failed – about 6 thousand soldiers were killed or captured, including one of the voivods – Vyshata.
- In 1046, peace was concluded between Kievan Rus and Byzantium, in honor of which Emperor Constantine IX married his relative to the son of Yaroslav the Wise – Vsevolod.
- In 1051, Yaroslav the Wise himself appointed Hilarion as metropolitan, for the first time without the participation of the Patriarch of Constantinople.