As far as I can tell, there have been no issues directly affected by what you choose your nations history to be in the nation creation process. Is this because its not tracked, or never been tried. I am assuming right now its technical, which is why I'm putting this here. I think there are a lot of unique issue ideas to be had with adding such in.
Off the top of my head, here are some of the *ideas I've had (3 of which I've begun writing and are now in the literal pile of different NS issue ideas I got floating around, though I wanted get this out of the way first). Do note that I reference the history groups name as a stand-in for their nation:
1. Ethnic Cleansing Refugees on a holiday for Genocide Remembrance (perhaps making a few references to issue 194).
2. Ethnic Cleansing Refugees and diplomatic policy with their attempted killer nation; this could either go down the road of the government surviving or a later issue where the tyrannical killers were deposed Nazi-style.
3. Civil Bloodbath Survivors on the question of if they should try and reconquer their nations former land.
4. Civil Bloodbath Survivors facing other Civil Bloodbath survivor-nations trying to "reconquer" them, as if they were ever owned by these madmen!
4. Diplomatic Homeland Wranglers feeling like a puppet state to their savior nations which gave them territory (as a smaller change, I'd also recommend changing this description to world powers instead of world superpower, as it opens up more opportunities).
5. Violent Segregationists and a minority group/territory which wants to rejoin their old nation.
6. Recently Discovered Undiscovered Tribe fighting new diseases.
7. Long-Suffering But Still Optimistic Pilgrims being mocked/tariffed for their religious beliefs by other nations.
8. Plucky, Malnourished Pioneers being *sued by their homeland for failing to do their job (or perhaps doing it too well).
9. Violent Segregationists under threat by their original nation.
As I think I show pretty well, there is a massive goldmine hiding here, so if we can tap it out tech-wise, I think it would be the largest change to NS issues in a long time. So, what do you say NS?
*The uselessness of such making this a great breakup issue.
*All of these are of course free to use, though with the very important caveat that you reference my creation of the idea, because I'm crazy like that.