Dictionary.com
definitions

Bonus Army

noun U.S. History.
  1. a group of 12,000 World War I veterans who massed in Washington, D.C., the summer of 1932 to induce Congress to appropriate moneys for the payment of bonus certificates granted in 1924.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018