The Imperial Unggoy Navy (IUN) is the space-based branch of the Unggoy Star Empire's armed forces. As of December 2571, it is considered to be the second-largest navy in the explored galaxy, after the UNSC Navy. The current Cold War between the USE and UNSC has seen dramatic surges in the IUN's budget and currently it maintains the largest arsenal ship fleet in the galaxy, with 500 vessels, and the second-largest carrier fleet, with 750 carriers. It currently operates 390 million regular personnel, 5,520 ships, and two million starfighters.