On July 15, 1794, tax collector John Neville and his slaves fired at a militia that had surrounded his house, killing a member of the militia. The next day, a group of militia members seeking Neville fired on a group of federal soldiers, causing casualties on both sides. Following this confrontation, the militia captured a federal marshal and continued to clash with federal forces. As word of this rebellion spread across the frontier, a whole series of loosely organized resistance measures were taken, including robbing the mail, stopping court proceedings, and the threat of an assault on Pittsburgh.