1953 x 2: Stalemate and Stalin
The Korean peace agreement finishes TWO evils that were left hanging in 1953.
Obviously it finishes the STALEMATE that paused the war.
It also finishes STALINISM.
Stalin died in March 1953. In most of the Soviet world his super-brutality faded down to a dull authoritarian regime by 1960, with a few major exceptions.
Mao rebranded Stalinism and continued redlining the brutal engine. Romania and Albania and North Korea also carried on, linking their trailers onto China instead of Russia.
China broke after the Cultural Revolution in '68, and gradually faded to authoritarian capitalism without ever officially switching brands.
Romania and Albania burned out in 1990. Romania is managing to repair the damage, but Albania is still competely broken and ungoverned.
After that, only NoKo remained absolutely Stalinist.
Now it's all over, and reunification will give NoKo a much better restoration than Romania and Albania.