His persecution of Christians also extended to captured British soldiers. For instance, there were a significant amount of forced conversions of British captives between 1780 and 1784. Following their disastrous defeat at the battle of Pollilur, 7,000 British men along with an unknown number of women were held captive by Tipu in the fortress of Seringapatnam. Of these, over 300 were circumcised and given Muslim names and clothes and several British regimental drummer boys were made to wear "ghagra cholis" and entertain the court as "nautch" girls or dancing girls. After the 10-year-long captivity ended, James Scurry, one of those prisoners, recounted that he had forgotten how to sit in a chair and use a knife and fork. His English was broken and stilted, having lost all his vernacular idiom. His skin had darkened to the swarthy complexion of negroes, and moreover, he had developed an aversion to wearing European clothes. During the surrender of the Mangalore fort which was delivered in an armistice by the British and their subsequent withdrawal, all the mesticos and remaining non-British foreigners were killed, together with 5,600 Mangalorean Catholics. Those condemned by Tipu Sultan for treachery were hanged instantly, the gibbets being weighed down by the number of bodies they carried. The Netravati River was so putrid with the stench of dying bodies, that the local residents were forced to leave their riverside homes.