The Jedi training cruiser Crucible served as a transport for the Jedi Order. Professor Huyang maintained his workshop aboard it for over 1,000 years.
During the Clone Wars, it was used by Padawan Ahsoka Tano to transport a class of Jedi Initiates from Coruscant to Ilum, where they underwent the ritual known as The Gathering. On the way back from the mission, it was attacked by pirates led by Hondo Ohnaka and boarded. Padawan Tano was captured by the pirates during the Jedi's subsequent escape when the ship went into hyperspace.
During the escape, the coolant system of the vessel was ruptured and in order to allow the system to restart they land the ship on the planet Florrum. After having rescued Tano, the younglings tried to escape using the Crucible. However, the pirates chasing the younglings shot the engines of the Crucible and it crashed, unable to fly with the damage it had sustained.
The design of the Jedi training cruiser was based on the Defender-class light corvette from the video game Star Wars: The Old Republic.