http://www.eyewitnesstohistory.com/snprelief4.htm
http://en.wikipedia.org/wiki/Bonus_Army
For starters.
The Bonus Army assembled (rather peacefully) to petition that the bonus promised to WWI vets be paid to them early. Gen S. Butler met with the men and their families, and showed them support.
Hoover ordered the Army and Gen. MacArthur to clear out the protesters. Using tanks, tear gas, and rifle buts they did just that. They then burned out the camp that the Bonus Army was using.
Funny thing was, that after Hoover lost the following election, Roosevelt handled the second Bonus march differently. He sent his wife to talk with them and offered them make work jobs in the CCC (great bit of PR there). My Grandfather remembered the incidents, and would talk of them from time to time. He did not have a high opinion of the Army for that and other incidents that happened during WWI.
You come onto FR with the BS claim that American soldiers and Marines will kill Americans based on Wiki and your perception of what your grandaddy told you when you were a kid.
You have slandered every Marine, soldier, airman and sailor, inferring that they are no better than Nazis, gestapo and eisengruppen.
I suggest you write an apology.