Mali is cool I'm glad that they stayed around in the series after Firaxis introduced them in Civ 4. I guess technically they're only in 4 and 6, but since Civ 6 Mali has Civ 5 Songhai's unique unit, I'd count Songhai as Mali. 
Link to the thread
Updated: 16th, September, 2011
2025 Update: January 12th, 2025

Link to the thread
Updated: 16th, September, 2011
2025 Update: January 12th, 2025