What did world war 1 veterans do to try to get their services bonuses early

The Bonus Army consisted of almost 43,000 marchers and about 17,000 veterans and their families who gathered in Washington in 1932. They had been awarded bonsuses in the form of certificates in 1924, which could not be redeemed until 1945. The Great Depression caused massive unemployment and veterans demanded immediate cash payment of the bonus. The marchers were dispersed by Douglass MacArthur.