Songhai

Tarikh al-Sudan: Increased Resource Capacity in Cities on Navigable Rivers. Your Trade Ships cannot be Plundered on Navigable Rivers.

Gold Bangles Infantry: Unique Infantry Unit. Has increased Combat Strength on Resource tiles. Receives additional yields when Plundering Trade Routes.

Tajiro: Unique Merchant Unit. Gain Gold when you create a Trade Route that has at least one Navigable River.

Tomb of Askia: Adds Gold. Increased Resource Capacity in this Settlement. Increased Gold and Production in this City for every Resource assigned to it. Must be built on a Desert tile.

Caravanserai: Unique Improvement. Gold base. Gold Adjacency for Rivers and Resources. Must be built on a Desert or Plains tile.

Economic

Militaristic

Navigable Rivers

Desert

Plains

Coast