Styx and REO Speedwagon: Arch Allies, Live at Riverport

Arch Allies is a live album recorded by REO Speedwagon and Styx at Riverport Amphitheatre (now Verizon Wireless Amphitheater) in Maryland Heights, Missouri, a suburb of St. Louis. Each band also released single live albums containing only their own tracks from this album. The Styx songs were released alone as At the River's Edge: Live in St. Louis and the REO songs were released as Live Plus, Live Plus 3 and Extended Versions.

• Tommy ShawSelf (Vocals / Guitar)
• James "J.Y." YoungSelf (Vocals / Guitar)
• GowanSelf (Vocals / Keyboards)
• Glen BurtnikSelf (Vocals / Guitar / Bass)
• Todd SuchermanSelf (Drums)
• Chuck PanozzoSelf (Bass)
• Kevin CroninSelf (Vocals / Guitar / Keyboards)
• Dave AmatoSelf (Vocals / Guitar)
• Neal DoughtySelf (Keyboards)
• Bruce HallSelf (Vocals / Bass)
• Bryan HittSelf (Drums)