Trailbaston (traillebastone, traillebastoun, traylebastoun) was a special type of itinerant judicial commission first created during the reign of Edward I of England and used many times thereafter during the reigns of Edward II and Edward III, primarily to punish felonies and trespass at the king's suit. The declared intention of the trailbaston commissions was to combat increasing levels of violence and public disorder, but an added bonus for the crown was the revenues brought by forfeiture, which was the punishment for conspiracy.