These are suggestions from the CT staff forum:
Historical Arena, Historical Events Arena, Axis vs Allied, Axis & Allies, Battle Arena, The War Room, WWII Theatre, Axis vs Allies, Classic Air battles, Historical plane setups, Historical Combat Arena.
Actually, the Theater of Operations sounds nice (and exciting) - it might not be as descriptive as the Axis vs Allied, but I like it.
Has some continuity (sp?) with "Theater"...