It was on 28 July, 1932, after local police had failed to drive them out, that mechanized and mounted units of the US Army invaded an encampment of unemployed Veterans of the First World War, who had come to Washington, DC to demand a payment of promised bonuses.
Cavalry units drew their sabres on the Veterans and burned down their makeshift dwellings. Bayonets, clubs, and tear gas were used to drive the demonstrators out the Capital. In 1936, the bonuses were paid.