The Abregado debris field circled Anza, which is the star at the center of the Abregado system. This debris field came into existence from the remnants of a Republic fleet. The fleet met its end when the Separatist heavy cruiser of the Subjugator-class, named Malevolence, obliterated it during the Battle of Abregado. This battle, which took place in the Abregado system, was one of the initial conflicts of the Clone Wars. The debris orbited the star.
The Abregado debris field made its initial appearance, though without a specific label, in the Star Wars: The Clone Wars animated series' first season episode titled "Rising Malevolence." This episode, considered canon, was the second episode and was initially broadcast on October 3, 2008. Its identification was first established within the episode's supplementary information located on StarWars.com.