It's after the ramp up in production of weapons used in the shooting war started.
Probably not. History has practically zero examples of foreign-caused popular revolts. When you want your person in power, you do a military coup.
What history is littered with is adversaries (a) constantly fomenting dissent in each other and (b) levelling up convenient revolutions. America has been doing the former in Iran since basically 1979. But to say the recent protests "may have been the US" is ascribing way too much influence to Washington.
You should go take a look at what Lenin and many other communists was doing and where he was physically right before the October revolution...
Also, Haiti slave revolt was heavily influenced by the French revolution.
Also, uhh the Taiping Heavenly Kingdom?
To what effect? The only other successful Communist revolution prior to the conclusion of the October revolution was the one in Mongolia [1]. It built on decade-old revolutionary ground [2]. (Finland, meanwhile, was seceding from White Russia.)
Trying to cause a revolution from abroad just doesn't work. Exhibit A: right now.
[1] https://en.wikipedia.org/wiki/Communist_revolution#Successfu...
The US could not participate in that because we had moved assets to south america to fuck with Venezuela. The war in Iran wasn't started until the USS Ford had been re-positioned back to the middle east.
