The UEF was a primarily military alliance between several empires, including:

• Uesureyan Star Empire
• Tymian Empire
• Tre Empire

UEF maintained a combined military, including space, ground, naval, and air forces, that were recognized by their green vests (the “Greens”). The UEF military was the spiritual predecessor to the Star Army of Nepleslia and Star Army of Yamatai. It included an army and the UE Spacy.