What Group Formed The Bonus Expeditionary Force That Marched To Washington In The Summer Of 1932?. Anywhere from 17,000 to 25,000 former doughboys formed a bonus expeditionary force (bef), otherwise known as the “bonus army,” and — bonus certificates in hand — they marched on.

Anywhere from 17,000 to 25,000 former doughboys formed a bonus expeditionary force (bef), otherwise known as the “bonus army,” and — bonus certificates in hand — they marched on.