his way to Moscow via Lithuania. Despite some tension, Moscow did not suffer any consequences. On the contrary, when Dmitrij left his son Vasilij the Grand Principality of Vladimir in his will in 1389, Tokhtamysh sanctioned it through his envoy, Shaykh Aḥmad. Semën and Vasilij of Suzdal' expelled their uncle Boris from Nižnij Novgorod, but he tracked down Tokhtamysh on campaign and returned with a new investiture from the khan in 1390. Russian recruits subsequently served Tokhtamysh in Central Asia. In 1391 Tokhtamysh sent his commander Beg Tut to ravage Vjatka, presumably in response to the depredations of the Ushkuyniks, buccaneers along the Volga; but the buccaneers launched a revenge raid on the area of Bolghar. Seeking cooperation against this and other threats, Tokhtamysh received Vasilij I of Moscow in his camp and invested him with the domain of Nižnij Novgorod despite the protests of its princes. Despite his sack of Moscow in 1382, Tokhtamysh had strengthened the power and wealth of its ruler in the end, helping set it on the path to annexing other Russian, and later Mongol polities. Initial conflict with Timur In 1383, taking advantage of Timur's preoccupation with affairs in Persia, Tokhtamysh restored the Golden Horde's authority over the semi-autonomous Ṣūfī Dynasty in Khwarazm, apparently without provoking his former patron. Under pressure from his emirs to provide profitable campaigns for plunder and perhaps possessed by the traditional ambitions of his predecessors, Tokhtamysh crossed the Caucasus with a large force (5 tumens, 50,000 troops) during the winter of 1384–1385, invading Jalayirid Azerbaijan. He captured the capital, Tabriz, by storm and ravaged the neighboring area for ten days, before retiring with his plunder, including some 200,000 slaves, among them thousands of Armenians from the districts of Parskahayk, Syunik, and Artsakh. Either to take advantage of Jalayirid weakness or to preempt the expansion of the Golden Horde into the area, Timur proceeded to conquer Azerbaijan in 1386. He was wintering in nearby Karabakh in 1386–1387, when Tokhtamysh crossed the mountains in the spring of 1387 and headed straight for him. Despite being taken by surprise and being nearly defeated, Timur's commanders rallied and succeeded in repelling Tokhtamysh's attack with the help of timely reinforcements led by Timur's son Mīrān Shāh. Timur showed remarkable leniency to the captured warriors of Tokhtamysh, feeding and clothing them and allowing them to return home. Whether this was a sign of respect toward