The climate changed again and began to warm, inspiring the rise of the Roman Empire. The warming trend allowed Julius Caesar (100-44 BC) to conquer and civilize Europe.
The climate change resulted in a sharp trend to a colder climate, which inspired the barbarian invasions (migration) into the Roman Empire where they moved south as the north grew severely colder.
the geologists discovered “a gradual drying between about 100 and 700 A.D. , with sharp drops in rainfall at 100 A.D. and 400 A.D.
6 ways climate change and disease helped topple the Roman Empire
The volcano that caused famines in ancient Rome? It was in Alaska