Boris Vasilyevich

…eldest surviving brothers, Andrey and Boris, whose grievances were further increased by Ivan’s refusal to give them a share of conquered Novgorod. In 1480 they rebelled, and only with difficulty were they persuaded to remain loyal. A more serious conflict arose (1497–1502) in the form of an open and murderous…

…his two brothers Andrey and Boris, who had been incensed by his high-handed appropriation of their deceased elder brother’s estates. They defected with their armies to the western frontiers but eventually returned and acknowledged Ivan’s territorial acquisitions and primacy.