Some LONG History: "Bolshevik Revolution", by Antony C. Sutton, PH.D.
I have not yet read all this, book-length historical text,.... which would take many hours or even a few days, to read it all, but what I have, is not very pleasant for our American eyes, for those of us who are not familiar with how the Communists seized power in Russia, and who helped them. But, I personally cannot verify all that is stated here. Some information presented here, may well be debatable and other historians may have different views on it all.
Let the readers judge for yourselves.
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8 minute video