Before revision: An infamous example of use of a red flag in warfare is Mexican General Antonio López de Santa Anna's use of the symbol to let his Texian opposition in the Alamo know that he intended to spare none of the defenders (on which he followed through ).
After revision: An infamous example of use of a red flag in warfare is Mexican General Antonio López de Santa Anna's use of the symbol to let his Texian opposition in the Alamo know that he intended to spare none of the defending slavers, though the slaves were spared and freed (on which he followed through ).