https://www.worldatlas.com/articles/what-is-a-trade-bloc-and-why-are-they-formed.html
Trade blocs are formed to allow trade to occur between different countries in a largely unrestrained fashion, similar to that occurring within national borders.
what istrade bloc
https://theconversation.com/ecowas-west-african-trade-bloc-shaken-as-three-member-states-withdraw-and-form-their-own-alliance-224209
Ecowas has a patchy track record when it comes to ensuring cooperation and security across west Africa – member states are now starting to leave.
west africantrade blocmember statesecowasshaken