The opening credits last card reads: "Any similarity to persons, places, or things depicted in this documentary is purely intentional."
The trailer says, "Five-Hundred-Thousand-Plus Peace Marchers on a Brisk November Day in Washington, D.C.". Actually, the documentary shows the (now historic) 11/15/69 march on, and rally at Washington D.C. attended by over half a million persons called by the Vietnam Moratorium Committee.
Although never mentioned by name in the film, the music festival near the end was the Miami Rock Festival, Miami-Hollywood Speedway, Florida, Dec 27-29, 1969.