Timur (Chagatai Turkic: تیمور Tēmōr, "iron") (1336 – 19 February 1405), among his other names[1], he is commonly called as Tamerlane

Military leader

Map of the Timurid Empire
In about 1360 Timur gained prominence as a military leader. He took part in campaigns in Transoxania with the khan of Chagatai, a fellow descendant of Genghis Khan. His career for the next 10 or 11 years may be thus briefly summarized from the Memoirs. Allying himself both in cause and by family connection with Kurgan, the dethroner and destroyer of Volga Bulgaria, he was to invade Khorasan at the head of a thousand horsemen. This was the second military expedition which he led, and its success led to further operations, among them the subjection of Khwarizm and Urganj.
After the murder of Kurgan the disputes which arose among the many claimants to sovereign power were halted by the invasion of the energetic Jagataite Tughlugh Timur of Kashgar, another descendant of Genghis Khan. Timur was dispatched on a mission to the invader's camp, the result of which was his own appointment to the head of his own tribe, the Barlas, in place of its former leader, Hajji Beg.
The exigencies of Timur's quasi-sovereign position compelled him to have recourse to his formidable patron, whose reappearance on the banks of the Syr Darya created a consternation not easily allayed. The Barlas were taken from Timur and entrusted to a son of Tughluk, along with the rest of Mawarannahr; but he was defeated in battle by the bold warrior he had replaced at the head of a numerically far inferior force.

Rise to power

Monument of Emir Timur in Tashkent
Tughlugh's death facilitated the work of reconquest, and a few years of perseverance and energy sufficed for its accomplishment, as well as for the addition of a vast extent of territory. It was in this period that Timur reduced the Jagatai khans to the position of figureheads, who were deferred to in theory but in reality ignored, while Timur ruled in their name. During this period Timur and his brother-in-law Husayn, at first fellow fugitives and wanderers in joint adventures full of interest and romance, became rivals and antagonists. At the close of 1369 Husayn was assassinated and Timur, having been formally proclaimed sovereign at Balkh, mounted the throne at Samarkand, the capital of his dominions.
It is notable that Timur never claimed for himself the title of khan, styling himself amir and acting in the name of the Chagatai ruler of Transoxania. Timur was a military genius but sometimes lacking in political sense. He tended not to leave a government apparatus behind in lands he conquered, and was often faced with the need to conquer such lands again after inevitable rebellions.