For 34 years, Libya flew the world's only single-colour national flag — a plain green rectangle. No stars,…

For 34 years, Libya flew the world's only single-colour national flag — a plain green rectangle. No stars, no crests, no stripes. Gaddafi adopted it in 1977 to symbolise his 'Green Book' ideology, and it stayed until his regime collapsed in 2011. What's the strangest national flag you've ever seen?