The Soviet regime first came to power on November 7, 1917, immediately after the Russian Provisional Government, which governed the Russian Republic, was overthrown in the October Revolution. The state it governed, which did not have an official name, would be unrecognized by neighboring countries for another five months.
What event led to the assumption of power by the Soviet government? (If the question is unanswerable, say "unanswerable")
the October Revolution