What was frederick douglass’s contribution to abolitionism?

he pressed the antislavery cause through his newspaper, the liberator.
he wrote the novel uncle tom's cabin, convincing northerners that slavery was evil.
he was a former slave who spoke out against the institution of slavery.
he was the commander of the famous black 54th massachusetts regiment.

When their period of service ended, indentured servants were forced to pay a fee to gain freedom. were forced into slavery. had land they owned taken away. were given freedom dues.

In italy, the distance between milan in the north and palermo,sicily, in the south is about 550 miles. in the united states, the distance betweenboston, massachusetts, and savannah, georgia, is about 900 miles. do you think the american revolutionaries of 1776 in the 13 colonies faced some of the same challenges as the patriots who struggled for italian unity in the 1860s?  

Why was the united nations established