President Herbert Hoover then ordered the army to clear the marchers' campsite. Army Chief of Staff General Douglas MacArthur commanded the infantry and cavalry supported by six tanks. The Bonus Army marchers with their wives and children were driven out, and their shelters and belongings burned.
Answer: There was continued diffusion of crops and pathogens throughout the Eastern hemisphere along the trade routes.
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Explanation:
Sumner was physically attacked by Brooks in Congress because "<span>d. Sumner challenged the Fugitive Slave Act and angered pro-slavery supporters" since he was an avid abolitionist. </span>
