Plague (sep 4, 165 BC – sep 4, 18 BC)
Description:
A wild disease had broken out in ancient Rome that they had no clue what it was. It was brought back by troops returning from the Near East. They had a few suspicions, but they weren't able to confirm what it was, and it still remains undefined. This disease ended up wiping out 20% of Rome's empire.
Source: https://www.ancient.eu/Antonine_Plague/
Added to timeline:
Date:
sep 4, 165 BC
sep 4, 18 BC
~ 147 years