Decembrist revolt at English => English (The Britannica Concise) Of Explained:
Unsuccessful uprising by Russian revolutionaries. Following the death of Alexander I, a group of liberal members of the upper classes and military officers staged a rebellion in an effort to prevent the accession of Nicholas I. The poorly organized revolt was easily suppressed. Afterwards 289 Decembrists were tried; five were executed, 31 imprisoned, and the rest banished to Siberia. Their martyrdom inspired later generations of Russian dissidents.