The 15th Infantry Division was an infantry formation of the Russian Imperial Army that existed in various formations from the early 19th century until the end of World War I and the Russian Revolution which dismantled the Tsarist autocracy and led to the rise of what?
Russian Revolution The Russian Revolution was a pair of revolutions in Russia in 1917 which dismantled the Tsarist autocracy and led to the rise of the Soviet Union. The Russian Empire collapsed with the abdication of Emperor Nicholas II and the old regime was replaced by a provisional government during the first revolution of February 1917 (March in the Gregorian calendar; the older Julian calendar was in use in Russia at the time). Alongside it arose grassroots community assemblies (called 'soviets') which contended for authority. In the second revolution that October, the Provisional Government was toppled and all power was given to the soviets.
History of the Soviet Union The "History of Soviet Russia and the Soviet Union" reflects a period of change for both Russia and the world. Though the terms "Soviet Russia" and "Soviet Union" are synonymous in everyday vocabulary, when referring to the foundations of the Soviet Union, "Soviet Russia" refers to the few years after the October Revolution of 1917, but before the creation of the Soviet Union in 1922.