Wikipedia describes content of the US Army Field Manual 30-31B:
It identifies a strategy of tension involving violent attacks which are then blamed on radical left-wing groups in order to convince allied governments of the need for counter-action.
Wikipedia says that US government claims it's a forgery. Other noteworthy people claim that it's real:
The former deputy director of the CIA, Ray S. Cline, has stated it to be genuine. Licio Gelli, the Italian leader of the anti-Communist P2 freemason lodge bluntly told the BBC's Allan Francovich, "The CIA gave it to me".
Is there convincing evidence to determine the authenticity of the document that goes beyond the summary of Wikipedia?