the Soviet Union or the USSR. In other European languages, the locally translated short forms and abbreviations are usually used such as and in French, or and in German. The Russian SFSR dominated the Soviet Union to such an extent that for most of the Soviet Union's existence, it was commonly, but incorrectly, referred to as Russia. Technically, Russia itself was only one republic within the larger union – albeit by far the largest, most powerful and most highly developed of the 15 republics. Nevertheless, according to historian Matthew White, it was an open secret that the country's federal structure was "window dressing" for Russian dominance. For that reason, the people of the USSR were almost always called "Russians", not "Soviets", since "everyone knew who really ran the show". Geography The Soviet Union covered an area of over , and was the world's largest country, a status that is retained by its successor state, Russia. It covered a sixth of Earth's land surface, and its size was comparable to the continent of North America. Its western part in Europe accounted for a quarter of the country's area and was the cultural and economic center. The eastern part in Asia extended to the Pacific Ocean to the east and Afghanistan to the south, and, except some areas in Central Asia, was much less populous. It spanned over east to west across eleven time zones, and over north to south. It had five climate zones: tundra, taiga, steppes, desert and mountains. The Soviet Union, similarly to modern Russia, had the world's longest border, measuring over , or circumferences of Earth. Two-thirds of it was a coastline. The country bordered (from 1945 to 1991): Norway, Finland, the Baltic Sea, Poland, Czechoslovakia, Hungary, Romania, the Black Sea, Turkey, Iran, the Caspian Sea, Afghanistan, China, Mongolia, and North Korea. The Bering Strait separated the country from the United States, while the La Pérouse Strait separated it from Japan. The Soviet Union's highest mountain was Communism Peak (now Ismoil Somoni Peak) in Tajik SSR, at . It also included most of the world's largest lakes; the Caspian Sea (shared with Iran), and Lake Baikal in Russia, the world's largest and deepest freshwater lake. History Revolution and foundation (1917–1927) Modern revolutionary activity in the Russian Empire began with the 1825 Decembrist revolt. Although serfdom was abolished in 1861, it was done on terms unfavourable to the peasants