Complex sentence: In Moscow, the most perilous and critical tasks during the October Revolution fell upon the Anarchist Regiment, led by the old libertarians and it was they who dislodged the Whites from the Kremlin, the Metropole and other defenses.
Split into simpler sentences: In Moscow, the most perilous and critical tasks during the October Revolution fell upon the Anarchist Regiment, led by the old libertarians and. It was they who dislodged the Whites from the Kremlin, the Metropole and other defenses.