Why did the Manhattan neighborhood of Harlem become a center for Afro-centric art, music, poetry, and politics?

As a result, Harlem, a neighborhood at the northern end of Manhattan, became a center for Afro-centric art, music, poetry, and politics; Revived by the wartime migration and fired up by the white violence of the postwar riots, urban blacks developed a strong cultural expression in the 1920s that came to be known

Explanation:

the phoenix dragon in the persian art reflect the alebrijes artistic styles

on the morning of  july 21,  1861, general mcdowell ordered the  unionarmy to attack. it was on this hill that  confederate  colonel thomas jackson and his forces held back theunion  troops.