Romanos I Lekapenos vs Tokhtamysh

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.

Tokhtamysh, with the support of Timur, defeated the rebellious general Mamai and reunified the Golden Horde under his rule. He restored the Horde's authority over the Russian principalities, ending a period of fragmentation.

Tokhtamysh led a campaign against the Grand Duchy of Moscow. He besieged and captured Moscow, burning the city and massacring its inhabitants. The victory reasserted Mongol dominance over the Russian principalities.

Tokhtamysh invaded Timur's territory in Transoxiana, starting a war between the two Mongol rulers. Timur retaliated by invading the Golden Horde, defeating Tokhtamysh at the Battle of the Kondurcha River in 1391.

Timur decisively defeated Tokhtamysh at the Battle of the Terek River. The victory destroyed Tokhtamysh's army and led to the sack of Sarai, the capital of the Golden Horde. Tokhtamysh fled and never regained power.

After his defeat by Timur, Tokhtamysh fled to the Grand Duchy of Lithuania. He was killed in a skirmish with a rival Mongol faction near Tyumen. His death marked the end of the last attempt to reunite the Golden Horde.