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1 ene 1862 año - Safety Valve Theory

Descripción:

This theory states that when hardships occurred in Eastern states, citizens move westward to new and prosperous opportunities.

Añadido al timeline:

period 6

ByAshley Wright

3 feb 2020

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329

fecha:

1 ene 1862 año

Ahora mismo

~ 163 years ago

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