From: Utlima Thule
All right now I'm flustered!
About ten years in on my first Grand Campaign (first exposure to PoN also) and playing the United States.
I am one of those "learn the rules as you go kind of guys" and I believe I'm doing pretty well with the economy and foreign policy. I've actually created Cambodia as a US colony and Hawaii and the Marshalls are Protectorates. I've started to figure out the balance between domestic and foreign trade and I'm creating Private Capital and Money at a fairly prodigious rate BUT....
What the hell do I do to keep the Northern population of the US from rioting and disruptiong all the wonderful factories and Coal mines that I have built :) !
I have coal mines and manufactured goods, textile and luxury factories built but New York, Boston, Cleveland and et al. are all in disorder or general strike. Taxes have been at 1 to 2% for 5 years but that doesn't help. I've had every social decree passed through Congress. Built every Telecommunications, Sewer and Road .
Now I can't do squat because 75% of my coal mines are on strike even though I have government and private cash up the ying yang.
Somebody please give me a hint what I'm forgetting to do!
I've not played the US but from comments, pre-civil war you have a number of inbuilt revolt problems.
So some you probably just need to ride out.
Having said that - put MP units in the high militancy provinces, if you don't have enough MP use Cavalry - both have a high police value and will drive militancy down.
Check you are meeting their needs, you sometimes need both the quantity stated and a decent range of goods so trading is the solution.
Play all the contentment cards (mostly on the F1 screen, some on F6).
Look at the various 'development' decisions - roads, wetlands, telegraphs, sewers etc, all these reduce underlying revolt risk.
Juggle your tax base, some have less impact on overall population militancy.
I'd suggest if you want US specific advise put up a query on the AGEOD forum, much more likely to get responses from people who have played the US and managed this problem.