section_path: Britain's imperial century (1815–1914)/Rivalry with Russia
section_name: Rivalry with Russia
paragraph_text: Rivalry with Russia
  
  During the 19th century, Britain and the Russian Empire vied to fill the power vacuums that had been left by the declining Ottoman Empire, Qajar dynasty and Qing dynasty. This rivalry in Central Asia came to be known as the "Great Game". As far as Britain was concerned, defeats inflicted by Russia on Persia and Turkey demonstrated its imperial ambitions and capabilities and stoked fears in Britain of an overland invasion of India. In 1839, Britain moved to pre-empt this by invading Afghanistan, but the First Anglo-Afghan War was a disaster for Britain.
  
  When Russia invaded the Ottoman Balkans in 1853, fears of Russian dominance in the Mediterranean and the Middle East led Britain and France to enter the war in support of the Ottoman Empire and invade the Crimean Peninsula to destroy Russian naval capabilities. The ensuing Crimean War (1854–1856), which involved new techniques of modern warfare, was the only global war fought between Britain and another imperial power during the Pax Britannica and was a resounding defeat for Russia. The situation remained unresolved in Central Asia for two more decades, with Britain annexing Baluchistan in 1876 and Russia annexing Kirghizia, Kazakhstan, and Turkmenistan. For a while, it appeared that another war would be inevitable, but the two countries reached an agreement on their respective spheres of influence in the region in 1878 and on all outstanding matters in 1907 with the signing of the Anglo-Russian Entente. The destruction of the Imperial Russian Navy by the Imperial Japanese Navy at the Battle of Tsushima during the Russo-Japanese War of 1904–1905 limited its threat to the British.