Enter the countries that have a wall, fence, or other barrier on part or all of their border. Enter countries on both sides of barriers, not just the country that erected the barrier.
Includes all disputed territories, but not overseas territories
Red background indicates disputed or partially recognized territories
Information according to Wikipedia and various other sources
I was wondering whether to include North Cyprus, but eventually I decided that even if one country recognizes it it's technically disputed, so I went ahead and included it.
I'm curious how many of these walls would be considered effective. The older ones probably much more so. And there were probably different motivations for each one, so it's hard to gauge what counts as effective, but still interesting.
In doing the research for this quiz, I found that the vast majority of these walls were created for one of three primary reasons: 1. separating two nations to reduce conflict or war between them, 2. stopping the international movement of migrants or illegal materials, or 3. establishing a de facto border. It seems that most walls built for the third purpose have been very effective, and those built for the first two purposes vary a bit more in their effectiveness.