1568, Sulaiman Khan annexed Orissa to the Karrani sultanate. Sulaiman Khan's authority extended from Cooch Behar to Puri, and from Son River to Brahmaputra River. On 25 September 1574, the Mughal Empire captured the Karrani capital Tandah. The Battle of Tukaroi fought on 3 March 1575 forced Daud Khan Karrani, the last Karrani ruler, to withdraw to Orissa. The battle led to the Treaty of Katak in which Daud ceded the whole of Bengal and Bihar, retaining only Orissa. Daud Khan, however, later invaded Bengal, declaring independence from Mughal emperor Akbar. The Mughal onslaught against the Karrani sultanate ended with the Battle of Rajmahal on 12 July 1576, during which Daud Khan was captured and later executed by the Mughals. However, the Pashtuns and the local landlords known as Baro Bhuyans led by Isa Khan continued to resist the Mughal invasion. Later in 1612 during the reign of Jahangir, Bengal was finally integrated as a Mughal province. Bangash state of Farrukhabad Muhammad Khan Bangash, who belonged to the Kaghazai line of Bangash tribe, became the first Nawab of Farrukhabad in 1713 in Uttar Pradesh, India. He named the city after then Mughal emperor Farrukhsiyar. The Bangash Nawabs encouraged merchants and bankers to come and settle in Farrukhabad for the promotion of commercial activities. Very important in this respect was the establishment of the Farrukhabad mint, which apart from being an emblem of sovereignty, stimulated bullion imports and attracted numerous bankers to work in the city. The superior quality of the Farrukhabad currency, both gold and silver, was well known in the eighteenth century as it became the most trustworthy and hardest currency of northern India. Ahmad Shah Durrani (1747–1772), the founder of the Afghan Durrani Empire, preferred coins made at the Farrukhabad mint. The third Nawab of Farrukhabad, Ahmad Khan Bangash, took part in the Third Battle of Panipat in 1761 and supported Ahmad Shah Durrani to defeat the Marathas. Because of its reputation as a centre of commerce and finance, Farrukhabad began to attract new Pashtun immigrants from Afghanistan. However, Bangash-held Farrukhabad suffered from a steep economic and political decline under the British Company Raj, because the British colonial officers ordered to close the famed Farrukhabad mint and halt the bullion trade in 1824 as part of their policy to centralize the economy of India. The abolition of the mint dealt a heavy blow to the thriving grain trade