 In 1818 they slaughtered Afghans and Muslims in trading city of Multan killing Afghan governor Nawab Muzzafar Khan and five of his sons in the Siege of Multan.In 1819 the last Indian Province of Kashmir was conquered by Sikhs who registered another crushing victory over weak Afghan General Jabbar Khan.The Koh-i-Noor diamond was also taken by Maharaja Ranjit Singh in 1814.