If you asked 1000 random people in UK, US, Australia......and more, the question " name 4 countries that border Thailand?", how many would answer correctly?
If you asked "name 4 countries that border Brazil?", how many would answer correctly?
The most difficulty I've had in explaining historic or geographic facts is the concept of Great Britan and United Kingdom. Who was I trying to explain to??? Americans. That's not to say all Americans don't understand, it's just an example.