Texas’ Regulator-Moderator War was one of the worst feuds ever. Dozens of folks died in the east Texas conflict between 1839 and 1844. But bad feelings and deeds continued after that point.
In 1847, a Moderator partisan named Wilkerson had a wedding party for his adopted daughter. He invited a number of Regulators to the festivities, then poisoned the refreshments (warning the bride, groom and other relatives not to eat or drink anything). Sixty people got sick, and somewhere around 10 died.
Wilkerson was later lynched.