Revelations of the Diplomatic History of the 18th Century

At the period of Ivan’s accession to the throne, the Golden Horde had long since been weakened, internally by fierce feuds, externally by the separation from them of the Nogay Tartars,^[104] the eruption of Timour Tamerlane,^[105] the rise of the Cossacks,^[106] and the hostility of the Crimean Tartars.^[107] Muscovy, on the contrary, by steadily pursuing the policy traced by Ivan Kalita, had grown to a mighty mass, crushed, but at the same time compactly united by the Tartar chain. The Khans, as if struck by a charm, had continued to remain instruments of Muscovite aggrandisement and concentration. By, calculation they had added to the power of the Greek Church, which, in the hand of the Muscovite grand princes, proved the deadliest weapon against them.