From 1977 to 2011, which African country’s national flag was a plain green field? Libya used a plain green national flag from 1977 to 2011.
The flag was adopted on 19 November 1977 under Muammar Gaddafi, after Libya withdrew from the red, white, and black flag associated with the Federation of Arab Republics. Its simple green field reflected Gaddafi’s political philosophy as expressed in The Green Book and was also associated with Islam and agriculture.
For most of that period, Libya’s flag was uniquely minimal: it had a single color and no emblem, stripes, stars, or lettering. The flag remained in official use until the 2011 Libyan uprising and civil war, when the earlier red-black-green flag of the Kingdom of Libya was revived by the opposition and later restored as the national flag.
The other choices are common traps because several African flags use green prominently. Sudan and Algeria, however, have multicolored designs, while Mauritania’s flag includes red bands and a crescent-and-star emblem.