Why were the Harlem hellfighters were formed

The Hellfighters originated as the 15th New York (Colored) Infantry Regiment, a National Guard unit. Members of the African American community in New York City's Harlem district had long advocated for the creation of a homegrown military unit, but white politicians blocked several attempts at establishing such a body.

Explanation:

June 2, 1913 is when they were

Like their predecessors in the Civil War and successors in the wars that followed, these African-American troops fought a war for a country that refused them basic rights – and their bravery stood as a rebuke to racism, a moral claim to first-class citizenship.

where is the passage

i cant solve it without knowing the passage

(d). gave voting rights to free african americans and white women.