Zaloriis was the home of the ancient and prestigious Zaloriis Imperial Military Academy. The Academy was established 23,000 years before the Galactic Empire. It took the "Imperial" part from the fact that it was built on the site of a Rakatan Infinite Empire military base. This annoyed Palpatine until his death. Due to the sparse population of the world, the Empire used it to test many of the crazy war machines they were developing, such as the AT-AT.