Background
After the death of his father in 1462, Andrey Bolshoy inherited the cities of Uglich, Zvenigorod, and Bezhetsk.
After the death of his father in 1462, Andrey Bolshoy inherited the cities of Uglich, Zvenigorod, and Bezhetsk.
Another conflict between the two brothers was triggered by the right of boyars to leave their own prince for the courts of other princes. Ivan III would only allow such practice if a boyar were to move to Moscow. When the latter refused to extradite the boyar, Ivan III ordered to capture Lyko-Obolensky and deliver him to Moscow in chains.
Andrei Bolshoy took the side of the offended prince of Volokolamsk.
The two brothers joined their armies and marched towards Novgorod and then to the Lithuanian border. There, they began to negotiate with the Polish king Kazimierz IV, who decided not to interfere in the conflict.
Boris and Andrey then sought support in Pskov, but to no avail. In order to settle the conflict, Ivan III offered Andrei Bolshoy the cities of Kaluga and Aleksin, but he refused.
Ivan III became more tractable and promised to fulfill all their demands.
Andrei and Boris moved their armies to the Ugra River and joined Ivan III in his stand-off with the Mongols. As a token of their reconciliation, the grand prince granted Andrei the city of Mozhaisk, the most coveted part of Yury’s appanage. He was afraid that, in line with the ancient system of Rurikid succession, Andrey would attempt to usurp the throne of Muscovy after his own death.
In 1488, Andrey was informed about Ivan"s plans to dethrone and imprison him.
Upon his epistolary complaint to the grand prince, the latter protested his innocence. Foreign reasons unknown, Andrei disobeyed the grand prince.
When he came to Moscow in 1492, he was arrested and put in prison, where he expired in 1493. Thereupon Andrey"s sons — Ivan and Dmitry — were imprisoned in Vologda, while their appanage — Uglich — was annexed into Muscovy.