Moments after Anakin Skywalker sealed his fate by cutting Mace Windu's hand and bowing before the man he should've rather made his enemy, Darth Sidious initiated Order 66, wreaking havoc across an already struggling galaxy.
Blind and deaf in his unfeeling madness, Skywalker vigorously followed Palpatine's every command. Every action he carried out, every life he cut short distanced him a little further from what remained of his humanity, and from his initial "good intentions".
In the meantime, on Utapau, the diligent Kenobi was defeating Grievous.
Little did he know, by setting on fire the heart of the more-machine-than-Kaleesh tool of mass destruction, he had also destroyed a microchip containing hundreds of codes of access to Separatist prisons across the galaxy. A microchip the late Count Dooku had personally inserted into Grievous' pulsating organ to keep it safe and hidden.
As Grievous' hybrid body inexorably met his end, hundreds of mechanical doors sprang open, liberating those who were still alive among Dooku's prisoners. While thousands of Jedi were about to meet their end galaxy-wide, a handful of dozens of (mostly unjustly detained) captives finally regained their unhoped-for freedom.
Among them, was Satine Kryze, former Duchess of Mandalore, long thought dead.
Kenobi, of course, was oblivious to all that.