https://en.wikipedia.org/wiki/Bonus_Army#Police_shooting
"An Army intelligence report claimed that the BEF intended to occupy the Capitol permanently and instigate fighting, as a signal for Communist uprisings in all major cities. It also conjectured that at least part of the Marine Corps garrison in Washington would side with the revolutionaries, hence Marine units eight blocks from the Capitol were never called upon. The report of July 5, 1932 by Conrad H. Lanza in upstate New York was not declassified until 1991."
If it aint broke