The answer is the Cold War as the world was divided between the Warsaw pact of the east and NATO of the West.
Where is the map....................
They were very nasty back then. The factories that they would make to food had sick animals with boils and other bacteria. They would still cook the food and sell it. The people would get sick. They didn’t wash their areas. Nowadays an inspector comes in the restaurants and check their foods, etc. and people are more sanitary than before
All land. i hope this helps u!!!!