The Dust Bowl of the 1930s forced many farm families to migrate west; it resulted from drought combined with

Apoor farming practices that stripped the Great Plains of topsoil

Bindustrial pollution from city factories

Ca major volcanic eruption

Da foreign military invasion

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The 1920s economic boom was fueled in part by new industries such as

The Wagner Act and the rise of the CIO in the 1930s led to

At the Paris Peace Conference, the 'Big Four' leaders shaped the postwar settlement, but the harshest demands on...

Coxey’s Army (1894) was a march on Washington by unemployed workers demanding