A clash occurred on Coruscant in the time of the Jedi-Sith War, and the Sith were the victors when all was said and done.
More than 1,000 years later, the event was of such importance that Trade Federation Senator Lott Dod mentioned it during a discussion with other plotters, as they tried to figure out how to get the Galactic Senate to deregulate banking. Dod considered the concept of orchestrating an assault so important, he pointed out that the last time Coruscant was assaulted was more than a millennium prior. Nix Card responded, stating that this extended period of tranquility had made the inhabitants of Coruscant self-satisfied, which would lead to the attack having a greater effect.