Rat Army was a Battle School Army most notably commanded by "Rose The Nose" Rosen and later Dink Meeker. The army was known to not have proper discipline, but followed Rosen's orders without hesitation. When Ender Wiggin was transferred to Rat Army from Salamander Army, he met Rose The Nose who gave him two rules (Don't piss on the bed, and follow his orders) and was put into Dink Meeker's Toon. Rat army shared a bathroom with Salamander Army.
After Rosen graduated, Dink was moved up to commander of Rat.
- Rosen (Commander, formerly)
- Dink Meeker (Toon leader, later Commander, formerly)
- Ender Wiggin (formerly)
- Zachariah Morgan