The Emirate of Afghanistan was an emirate between Central Asia and South Asia, which is today's Islamic Republic of Afghanistan. The emirate emerged from the Durrani Empire, when Dost Mohammed Khan, the founder of the Barakzai dynasty in Kabul, prevailed. The history of the Emirate was dominated by 'the Great Game' between the Russian Empire and the United Kingdom for supremacy in Central Asia. This period was characterized by the expansion of European colonial interests in South Asia. The Emirate of Afghanistan continued the war with the Sikh Empire, which led to the invasion of Afghanistan by British-led Indian forces who defeated the Afghans in 1842 but did not accomplish their war objectives. However, during the Second Anglo-Afghan War, the British again defeated the Afghans and this time the British took control of Afghanistan's foreign affairs until Emir Amanullah Khan regained them after the Anglo-Afghan Treaty of 1919 was signed following the Third Anglo-Afghan War.