The self-named Bonus Expeditionary Force was an assemblage of some 43,000 marchers — 17,000 World War I veterans, their families, and affiliated groups, who protested in Washington, D.C., in spring and summer of 1932. Called the Bonus March by the news media, the Bonus Marchers were more popularly known as the Bonus Army. It was led by Walter W. Waters, a former Army sergeant. The veterans were encouraged in their demand for immediate cash-payment redemption of their service certificates by retired U.S.M.C. Maj. Gen. Smedley Butler, one of the most popular military figures of the time.