African leaders met Sunday to launch a continental free-trade zone that if successful would unite 1.3 billion people, create a $3.4 trillion economic bloc and usher in a new era of development.

After four years of talks, an agreement to form a 55-nation trade bloc was reached in March, paving the way for Sunday's African Union summit in Niger where attendees will unveil which nation will host the trade zone's headquarters, when trading will start and discuss how exactly it will work.

It is hoped that the African Continental Free Trade Area (AfCFTA) — the largest since the creation of the World Trade Organization in 1994 — will help unlock Africa's long-stymied economic potential by boosting intra-regional trade, strengthening supply chains and spreading expertise.