You could talk about social change and order. This was a main topic going on during 2020, with the Black Lives Matter movement. And you don’t have to just discuss that movement but you can talk about other parties such as natives Americans, Immigrants, Women, etc.
Regiment, in most armies, a body of troops headed by a colonel and organized for tactical control into companies, battalions, or squadrons.
The two states affected by the winter weather were Kentucky and Ohio
Renaissance
The age of enlightenment began in the 1650's, so it would need to be a continuation of an era that ended around the 1650's. Since the Renaissance lasted from 1350 - 1650, that makes it the most likely answer.
