Related Clues:

• Historical segment
• Unratified amendment
• Word after Big Band or Reagan
• 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
• Sets off
• A strike-out makes it go down