Related Clues:
- History course topics
- Historian's units
- Characteristic times
- Chronology segments
- Important times, historically
- Some under assault for long periods
- Times to strike out with no end in sight
- Times are bad - start saving!
- The times are changing, son
- Deliver a sermon, taking ages
- Periods of European disease causing skin rash, reportedly
- European disease orally transmitted in certain times
- Divisions of eons
- Important stretches
- Particular periods of history