During the time of the High Republic Era, the Nihil pirates launched an attack against the Outer Rim planet of Valo, and subsequently, they occupied Valo. This was achieved by concealing it within their Stormwall located in the Occlusion Zone.
The 2024 junior novel, Escape from Valo, by Daniel José Older and Alyssa Wong, which is a part of Phase III of the Star Wars: The High Republic multimedia initiative, featured the occupation of Valo.