Before Islamic influence started in the mid 8th century AD, Tashkent was influenced by the Sogdian and Turkic cultures. After Genghis Khan destroyed it in 1219, it was rebuilt and profited from the Silk Road. From the 18th to the 19th century, the city became an independent city-state, before being re-conquered by the Khanate of Kokand. In 1865, Tashkent fell to the Russian Empire; it became the capital of Russian Turkestan. In Soviet times, it witnessed major growth and demographic changes due to forced deportations from throughout the Soviet Union. Much of Tashkent was destroyed in the 1966 Tashkent earthquake, but it was rebuilt as a model Soviet city. It was the fourth-largest city in the Soviet Union at the time, after Moscow, Leningrad and Kyiv.