A rivalry breaks outs between the Greek and Roman pegasi, but as harmless pranks turn into fighting, a war is started that splits the pegasi. As Friends turn on friends, the Greek leaders Spitfire, Rainbow Dash, and Flutteryshy are horrified to learn that Soarin, Scootaloo, and Derpy are Romans, and all realize this war might end in tragedy if it is not stopped. "SPQR: For the Senate and Pegasi of Rome."