3/6/1836: Mexican troops defend their country's abolitionist constitution, defeat foreign slaveholders. San Antonio, Texas. Remember the Alamo.
Then again, maybe they were just trying to get part of their country back. I wish they'd try again.
1857: Dred Scott decision by U.S. Supreme Court opens federal territory to slavery and denies citizenship to blacks, ruling that blacks are not entitled to protection under the law. The "unhappy Black Race," wrote Chief Justice Roger Brooke Taney in his opinion, had never possessed "rights which the white man was bound to respect."
Gee, sumthin' happens nearly every day! Go read.