sentences:  On 5 November 1917, two days before the October Revolution in Saint Petersburg, Estonian Bolshevik leader Jaan Anvelt led his leftist political forces in an anti-democratic coup in Tallinn, attempting to usurp political power in governorate from governor Jaan Poska on 9 November.On the "Maapäev", refusing to recognize the attempted Bolshevik coup d'état, proclaimed itself to be the only legally elected and constituted authority in Estonia.However, it was soon driven underground by the Bolsheviks.