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https://en.wikipedia.org/wiki/Bonus_ArmyThe Bonus Army was a group of 43,000 demonstrators – made up of 17,000 veterans of the United States in World War I, together with their families and affiliated groups – who gathered in Washington, D.C. in mid-1932 to demand early cash redemption of their service bonus certificates.
On July 28, 1932, U.S. Attorney General William D. Mitchell ordered the veterans removed from all government property. Washington police met with resistance, shot at the protestors, and 2 veterans were wounded and later died. President Herbert Hoover then ordered the U.S. Army to clear the marchers' campsite. Army Chief of Staff General Douglas MacArthur commanded a contingent of infantry and cavalry, supported by six tanks. The Bonus Army marchers with their wives and children were driven out, and their shelters and belongings burned.