Bing found the following results
Wadai Empire - Wikipedia
Wadai | Sultanate, Central Africa, Chad | Britannica
Ouaddaï Region - Wikipedia
The desert kingdom of Africa: A complete history of Wadai
Wadai War - Wikipedia
Wadai Empire - Wikiwand
Wadai | Encyclopedia.com
Wadai Empire | Detailed Pedia
Wadai (Ouaddai) Empire - Saxon - Wiley Online Library
Wadai - Encyclopedia