Romanos I Lekapenos vs Yuri Dolgorukiy

Romanos I led successful campaigns against the Abbasid Caliphate, recapturing several fortresses in eastern Anatolia. His general John Kourkouas achieved notable victories, including the capture of Melitene in 934.

Romanos I Lekapenos, a naval admiral, was appointed co-emperor by the young Constantine VII. He gradually sidelined Constantine and became the de facto ruler. His rise marked the beginning of the Lekapenos dynasty's dominance.

Romanos I negotiated a peace treaty with Tsar Peter I of Bulgaria, ending decades of war. The treaty included a marriage alliance between Peter and Romanos' granddaughter Maria. This brought stability to the Balkan frontier.

Romanos I was overthrown by his own sons Stephen and Constantine, who forced him to become a monk. He was exiled to the island of Prote and died in 948. His sons were soon overthrown by Constantine VII.

Yuri Dolgorukiy invited Prince Sviatoslav Olgovich to a meeting at a place called 'Moscow' in the chronicles. This first written mention of Moscow is traditionally considered the founding date of the city.

Yuri Dolgorukiy launched a campaign to seize the throne of Kiev from his nephew Iziaslav. He captured Kiev in 1149 and ruled briefly, but was expelled in 1151. He finally secured Kiev in 1155, ruling until his death.

Yuri Dolgorukiy ordered the construction of a wooden fortress (kremlin) on Borovitsky Hill in Moscow. This fortification became the nucleus of the future Moscow Kremlin and the city's defensive core.

Yuri Dolgorukiy died suddenly after a feast in Kiev, suspected of being poisoned by the Kievan boyars. His death ended his rule and led to a revolt against his administration in Kiev.