In Star Wars Rebels season 1, episode 5, 'Rise of the Old Masters', Imperial Senator Gall Trayvis tricked the Ghost crew into heading to the Stygeon system - specifically to the Spire - where the Empire was apparently holding Jedi Master Luminara Unduli prisoner.
Related: Star Wars: Every Jedi Who Survived Order 66 (In Canon) And needless to say, they were successful in doing their job - and part of their success can be attributed to how they lured Jedi into traps. They had a sizable presence in both the animated series Star Wars Rebels and the video game Jedi: Fallen Order. Vader did this with the help of his Inquisitorius (and their Purge Troopers), a group of dark side Force users known by others as Jedi hunters. The Emperor tasked Darth Vader with snuffing out the Jedi from the galaxy in the period between the prequel and original Star Wars trilogies. Kanan Jarrus once told his apprentice Ezra Bridger that there were approximately 10,000 Jedi in the galaxy during the Clone Wars, but Emperor Palpatine's Jedi Purge - which began with Order 66 - brought that number down to only a few. Thousands of Jedi were killed after the Clone Wars, but Star Wars Rebels revealed there was one Jedi the Empire lied about being alive in order to lure surviving members of the Order into a trap.