Battle of the Amu Darya

Timur Shah's march north encountered immediate difficulties, supply shortages in the mountain passes, artillery immobilised in snowbound tracks, and armed clashes with the Shaikh ʻAli Hazaras when customary payments for passage were withheld. After forcing his way across the Shibar Pass and down the Surkhab valley Timur reached Baghlan, where he was joined by Mir Qilij ʻAli Beg the Mir Wali of Khulm. Acting on Mir Wali's advice, Timur first moved to secure Qataghan, despite the numerical superiority of Timur's army the Qataghan cavalry proved dangerous, and a political settlement was reached that left Mizrab Bi as ataliq in return for acknowledging Durrani suzerainty and paying tribute.^[3][1]

Following operations in Qataghan Timur advanced on Balkh. The Bukharans withdrew from the immediate siege lines and fell back into the Chahar Wilayat in an effort to draw the Durrani forces into an overextended supply situation. Shah Murad then organized a night attack, two columns of cavalry reported at roughly 30,000 men crossed the Amu Darya in a bid to encircle Timur's army. Thanks to intelligence from the Mir Wali's network Timur positioned his troops across the line of attack, in the ensuing battle the Bukharan assault was repulsed and contemporary sources place Bukharan losses at about 6,000 killed. Following this defeat Shah Murad dispatched senior religious envoys to negotiate, he reconfirmed earlier agreements dating from 1768 and Timur Shah in turn acknowledged Bukharan sovereignty over Shahr-i Sabz and Merv.^[3][1]

Timur Shah withdrew toward Kabul but left roughly 4,000 cavalry under Muhammad Khan Qizilbash to garrison Aqcha and the citadel at Balkh. The Durrani retreat over the Hindu Kush proved catastrophic, winter came early, upper valleys and passes were blocked by snow, many soldiers lacked winter clothing, and thousands perished of exposure. The severe losses and the logistical drain encouraged the amirs of the Chahar Wilayat to renounce Durrani overlordship and insert Shah Murad's name in the khutba. Thus while the Durranis regained a measure of control over Balkh and Aqcha, the campaign produced limited durable gains and imposed a heavy fiscal burden on the Durrani state contemporary estimates describe an annual cost to the treasury of more than half a million rupee.^[4][1]