I agree history records fort sumter as the official start of the war, but I guess I was looking at it big picture that "a war was on it's way" regardless of the singular event that sparked full war.
My perspective on the civil war is "good thing it happened and the Union won, otherwise who knows how long black people would have been enslaved". It would have been nice to end slavery without the war, but Lincoln tried to negotiate to this end extensively and couldn't secure it.
Also, yes I agree the vietnam war is severely undertaught. And in the modern era, Afghanistan.
It's also worth noting that most people don't realize there are more black people enslaved today than in the US Civil War, not to mention other enslaved groups.