Why did the bonus army march on washington d. c.?

How does the grapes of wrath identify the effects of americans' views on the dust bowl? the story is a depiction of oklahoma farmers and the difficulties they experienced migrating to california. the story accurately describes the impact the california vineyard industry had on migrant workers. the story covers the rise of corporate farming and the devaluation of the small family farms that dotted the great plains. the story is an allegory for the conflicts between american values and the rise of the communist party in the united states.

What do the discoveries of shells used in jewelry and a huge dredged canal tell us about the indus valley civilization?

What happened as agriculture became entrenched in the south ?