Related Clues:

• The Eisenhower years, e.g.
• Cheer alternative
• History book discussion, perhaps
• Historical classification
• Good feeling time?
• It often ends in -zoic
• Geological span
• NOW issue
• Paleontology period
• Hurling stat
• A strike-out makes it go down
• United nations, e.g.
• Historic period of note
• Memorable time in history
• Countries in a special alliance