Why do you insist on humiliating yourself over and over again?
WHEN DID SLAVERY REALLY END IN THE UNITED STATES?
"slavery in the continental United States came to an end as a legal institution on June 14, 1866, when the Creek Tribe agreed to abandon African-American slavery."
https://law.marquette.edu/facultyblog/2013/01/when-did-slavery-really-end-in-the-united-states/
One might ask you the same question.
WHEN DID SLAVERY REALLY END IN THE UNITED STATES?
You said slavery was abolished in 1866. Slavery in the United States was abolished when the 13th Amendment took effect in December 1865. The Constitution and U.S. law did not apply to recognized Indian nations such as the Creek, which is why a treaty was required to get the Creek to free their remaining slaves.
You schooled her. This reminds me of all the ignorant news media @$$holes heaping scorn on Sarah Palin for saying "Party like it's 1773."
They all said some version of "Poor stupid woman, she doesn't know the American revolution happened in 1776. "
And of course they were the idiots. The Boston Tea Party, which is what she was referring to, happened in 1773.