The Russian Monacrchy which at the time was led by Czar Nicholas II was overthrown by the Bolshviks who were led by Vladmir Lenin.
Any government may be overthrown.
The Russian Provisional Government under Alexander Kerensky was overthrown by the Bolshevik Revolution. It did not overthrow Tsar Nicholas II. He had already been overthrown by the February Revolution.
In September 1917
The Russian Provisional Government under Alexander Kerensky was overthrown in November 1917. The Tsarist state had been overthrown in February of 1917 in the February Revolution.
Stalin played a key role in the bolshviks revolution, his role was to convert the non russian citizens to become bolshviks supporters.
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England.
Kwame Nkrumah was overthrown by members of Ghana's government and military, led by General Emmanuel Kotoka
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Russia
It will not be at any foreseeable time.
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