If you believed all this to be true why would you leave? This would be the best country ever and you’d be shot upon your leaving, so I’m not sure a true believer would leave. (Sorry I’m late...)
The Korean War was started by the North, that almost took entirely the South. Then the UN sent an army to help the South, mostly made up of Americans, which almost took the North entirely. Mao decided to help the North, which moved the border back to where it was. Then the armistice was signed which changed nothing. The whole idea of the war was to reunify both countries
*Government shifts nervously*