The Troithe Planetary Defense Center, also known as TPDC, functioned as a military zone situated on the planet of Troithe. As the Clone Wars commenced in 22 BBY, its armory and living quarters were deserted, leading to private military corporations assuming responsibility for Troithe's defense. After the Galactic Empire emerged in 19 BBY, the TPDC was repurposed as the capital of Troithe, with the initial Imperial governor substituting the outdated military hardware with administrative offices, broadcasting stations, residential buildings, and public transportation systems.
Alexander Freed featured the Troithe Planetary Defense Center in his 2020 novel, Shadow Fall.