Hoover reacted to the bonus Army by ordering General Macarthur to force the veteran soldiers, their families, and their supporters out of the city with the help of armed regiments.
Explanation:
World War I veterans who were released from the service after the advent of the Great Depression had been given certificates promising them the remuneration they deserved for fighting in the World War.
These veterans, for their demand of cashing the certificates, gathered in a huge number in Washington D.C. with their families and supporters.
This protest put President Herbert into distress and as a result, he ordered the then serving general of the army to sweep these protesters out of the city with the help of armed regiments.