Not sure what you're looking for exactly, but they were certainly risking their lives and livelihoods. African-Americans weren't the only people to be lynched in the fight against racism- black and white abolitionists were at risk as well (though certainly whites to a lesser degree).
built the Great Pyramids
developed advanced irrigation
expanded the empire’s territory
improved trade and transportation
Answer:
“How can we know who we are and where we are going if we don't know anything about where we have come from and what we have been through, the courage shown, the costs paid, to be where we are?”
Explanation:
Maryland 1800's