Da_Gut quoted One Tin Solder by Chris Tullbane (The Murder of Crows, #3)
And then there were the slavers. If you were born post-Break in some part of the world that still had schooling, you probably heard the story of slavery. Centuries of human subjugation, finally ended when the great wartime president, Abraham Lincoln, rode down out of the clouds on his red, white, and blue Pegasus, and set the land’s slaveowners on fire with a single, terrible match, declaring the country that was then the United States of America to be a free land for everyone. It was a great day for everyone but the slave owners. And the turkeys, I guess. Apparently, there was some sort of feast afterwards, and that was how Thanksgiving had gotten started. A yearly reminder that we were all free, regardless of the color of our skin or the content of our character. And then Dr. Nowhere went and broke the world. After that, strong men and women took over and did what assholes in power too often do.
— One Tin Solder by Chris Tullbane (The Murder of Crows, #3) (Page 61 - 62)
Damien isn't the greatest student - and some pre-break history has gotten a bit distorted.