The Battle of Grizal, also known as the infiltration of Grizal, was fought in the aftermath of the attack on Valo when the Jedi attacked the Nihil base on Grizal. The Jedi were able to locate the base after allowing the pirate Quin Amarant to escape Valo in a shuttle aboard which Jedi Knight Indeera Stokes and her Padawan Bell Zettifar were hiding, allowing the two to activate a homing beacon upon their arrival on the planet.
Once the signal was received, Jedi Master Stellan Gios and his Red Group departed the ongoing skirmish at Cyclor against one Tempest of the Nihil, arriving at Grizal and assaulting the base.
During the attack, Zettifar was briefly reunited with his thought-dead Master, Loden Greatstorm, who had been a prisoner of the Nihil. However, Eye of the Nihil Marchion Ro unleashed a weapon called the Great Leveler against the Jedi, killing Greatstorm and traumatizing Zettifar.
In the aftermath, the Jedi assumed that the Twi'lek Tempest Runner Lourna Dee, who had escaped the battle, was the true leader of the Nihil.
According to Jedi Master Harli Cogra, the battle came to be counted amongst the Republic's greatest victories over the Nihil.
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