TAKE THE WAR TO WASHINGTON

I wonder if anyone remembers a British author Peter Van Greenaway.
During the the sixties, seventies and eighties he was quite a popular author both as a novelist and short story writer.
In 1974 he wrote a novel called 'Take The War To Washington'. The novel concerned a group of Vietnam veterens who feeling sidelined and neglected by the country that sent them to war decide to take that very war to Washington.
Well they set the ball rolling by crashing a passenger plane into the Pentagon before setting out to attack the tallest buildings.
A surprising plotline in a forgotten book by a forgotten author about a forgotten army.