In 21 BBY, during the Clone Wars between the Galactic Republic and the Confederacy of Independent Systems, Jedi General Aayla Secura went on a mission to the Secret Research Facility on an unmapped moon in the Outer Rim Territories. Secura and her astromech droid QT-KT were sent to the facility to locate a "big secret" hidden there. After finding a platform to upload the data, the duo was stopped by Dark Acolyte Asajj Ventress, who took the data from them. She then used the Force to attempt to take QT-KT away but Secura pulled the droid back with the force, although the astromech's head became detached.
Secura and Ventress then drew their lightsabers and engaged in a lightsaber duel. The two leapt from platform to platform, blocking each others' blows. Ventress warned Secura to escape while she could, before the beam glowing through the facility overheated, which would take down the whole facility. Ventress then threw her lightsabers at Secura, which missed and instead hit a pipe which caused the beam to become unstable and the floor begin to crack, while Ventress and Secura continued their duel.
Realizing it was her duty as a Jedi to be selfless, Secura used her Force powers to protect the research facility's Geonosian workforce from the debris, ordering them to escape. Ventress scorned the Jedi's perceived weakness, but also took the opportunity to flee.
- Star Wars: Timelines