If you want to learn about a real breakaway province, look up Transnistria:
https://en.wikipedia.org/wiki/Transnistria
I've only been to the border. I was staying with Peace Corps volunteers and they risked getting fired if they crossed the boarder (I was told there have been kidnapping situations, but not sure if that's true).
US embassy officials have gone, but they are required to turn around if asked for passports since the US doesn't recognize them as a State. Members of the Peace Corps told me the Russians have supported the region with troops which they've brought in via Ukraine with Moldovan escorts, so there's all types of corruption leading up to that. I was visiting around the time the head of state of Moldova was arrested for embezzling several billion euros.