After the defeat at Belyov Vasily II together with Dmitry Shemyaka and Dmitry Krasny signed a treaty with Boris Aleksandrovich, Grand Prince of Tver, envisaging, in particular, mutual aid in case of invasion of "Tsar" (Khan) or other Tatars. In return, Vasily and his cousins promised not to accept the city Tver and Kashin from the Tatars.[10][lower-alpha 2]