The history of Russia begins with the East Slavs, Turkic, and the Finno-Ugric peoples. Parts of Southern Russia around the Black sea were settled by Greeks and Romans until about the 3rd century. Huns and Turkic tribes invaded the regions around the Black sea until the 10th century. Eastern Slavs then immigrated to the region. Vikings created the Kievan Rus. In the 13th century, Mongols conquered the region and created the Golden Horde. The Mongols ruled until the 15th century. The tsardom of Russia and Russian empire were then created. Poland-Lithuania invaded Moscow, but Russia eventually drove them out. Russia expanded more west and east into Siberia. Napoleon tried to invade Russia during the winter but failed. Russia fought against Germany in WW1. In 1917, the October Revolution happened, and the communists led by Lenin created the Soviet Union. In WW2, Hitler also failed to invade Russia. Russia occupied East Germany, Poland, and most of East Europe during the Cold War. It became a big rival of the United States. In the 1990s, the Union ended, with things like the Yugoslavia revolution, and became modern Russia. In 2014 Russia annexed Crimea from the Ukraine and faced sanctions from US and others because of it.