The English civil war and it's belligerents, the roundheads (being parliamentarians) and the cavaliers (being royalists), greatly explain the the political divisions of America today.
The puritan roundheads landed on Plymouth and preceded to people the north east with their ways and particular idiosyncrasies. These idiosyncrasies have remained durably in the north east in its culture and politics.
The cavaliers landed in Jamestown (13 years prior to Plymouth) and preceded to people the south with their ways. Ways which have remained durably in the South.
These differences were reinforced with the Quakers coming to the Delaware valley. Being similar to the Puritans and peopling the mid Atlantic they reinforced much of the cultural architecture that had been erected in the North. Their well known pacifism is still an active (if not particularly powerful) current in US politics.
In Appalachia and the frontier moving west, we have the Scots Irish who's more war like and honor bound culture reinforced the foundations already laid out by the Cavaliers.
As of 2018 Southern men enlisted in the military at a rate 22% higher than the rest of the US (per a study by the Uni of Omaha
Study ).
It's funny how as kids we seem to be taught much more about Plymouth and the Puritans than about Jamestown and the Cavaliers.
David Hackett Fischer's Albion's Seed lays much of this foundation out. I'll have to read it soon.