Answer:
Advances: The freeing of the slaves through the Thirteenth Amendment, the giving of citizenship to African Americans through the Fourteenth Amendment, and the protection of voting rights through the Fifteenth Amendment
Setbacks: The black codes restricted
Explanation:
During the Second World War, women proved that they could do "men's" work, and do it well. With men away to serve in the military and demands for war material increasing, manufacturing jobs opened up to women and upped their earning power. Yet women's employment was only encouraged as long as the war was on.
They used 20-day months, and had two calendar years: the 260-day Sacred Round, or tzolkin, and the 365-day Vague Year, or haab. These two calendars coincided every 52 years. The 52-year period of time was called a "bundle" and meant the same to the Maya as our century does to us.
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