The Bonus Army

Here's some history you never heard about in school. The Bonus Army.
Okay, so I went to school in Canada. But I did study US history, and I never heard of the "Bonus Army" or the fact that they were attacked by General MacArthur - in Washington, DC in 1932. MacArthur was booed by bystanders during the attack.  http://en.wikipedia.org/wiki/Bonus_Army