I've just updated A HISTORY OF US to include some new stories, especially those on people who haven't had their full story told, like Native Americans and African Americans. I've been astounded by some of what I've learned, I think you will be too.
Have you heard of Ona Judge? She was enslaved by George Washington; she ran away to freedom, and then ... you'll have to read the story to find out.
Then there were two women 100 years before Rosa Parks who got on public transportation and were kicked off because of their skin color. They fought back and changed transportation in their cities.