noun
October Revolution
Historical term referring to the Bolshevik revolution in Russia in October 1917 (November by the Gregorian calendar).
十月革命はロシアの歴史を大きく変えた。
The October Revolution dramatically changed Russian history.
From 十月 (じゅうがつ, 'October') + 革命 (かくめい, 'revolution'), a direct translation of the Russian term.