Michael granted Niketas the title of
megas doux and was forced to sign the document which gave Niketas and his ministers almost all power in the Empire, promising to seek their counsel in all official actions. This constitutional experiment was short-lived, because the greatest opposition came from the people of Trebizond. They were infuriated to see the Emperor stripped of his effective authority and rose up in revolt against the oligarchy of the
Scholarioi. Michael swiftly took advantage of the opportunity, and arrested and imprisoned Niketas in 1345. Also, he sent his son John off to Constantinople and then
Adrianople where he was to be kept prisoner to prevent him from becoming a further focus for the discontented nobles of Trebizond. Taking advantage of the instability in Trebizond, the
Turkmen attacked the Empire in 1346, capturing the towns of Hagios Andreas and
Oinaion. In September 1347, the
Black Death struck Trebizond, raging for seven months. Its effects on the city is unclear:
Andrew Libadenos, who was at Trebizond at the time, makes no mention of the epidemic, while
Michael Panaretos describes how the Black Death carried off "many: children, husbands, wives, brothers, sisters, mothers, and kinsmen." Another Turkmen invasion the following year led to a three-day battle. Despite the victory, Michael's reputation as ruler was not strengthened. In 1348, the Genoese seized
Kerasous, the second most important city of the Empire in revenge for a massacre of Genoese by the Trapezuntines some years earlier. In May 1349, a Genoese expedition from
Caffa was launched against Trebizond. The small Trapezuntine fleet under
Megas doux John Kabazites was destroyed and the people of Trebizond responded to this defeat by killing any Westerner they found in the capital. Eventually, peace was reached with the Genoese, but in exchange for Kerasous they were given the fortress of
Leonkastron. From now on Trebizond's commercial capacity was lessened even further, as the Genoese came to increasingly command the lucrative
Black Sea trade of the port. The deposed Emperor Michael was forced to become a monk at the cave monastery of St Sabas. In 1351, he was sent to Constantinople. Michael was released by Emperor
John V Palaiologos in 1355; despite being in his sixties, he set forth to Trebizond, hoping to recover his throne. Michael advanced as far as
Sumela Monastery, but was prevented from entering his former capital. He returned to Constantinople, where he died. == Acropolitissa ==