The main regional bloc, the Economic Community of West African States (ECOWAS), has imposed sanctions and said it could authorise the use of force as a last resort if soldiers do not restore ousted president Mohammed Bazoum to power. Below are previous ECOWAS military interventions:LIBERIAIn 1990, West African leaders sent a neutral military force to Liberia to intervene in the civil war between the forces of President Samuel Doe and two rebel factions. West African forces were deployed again at the tail end of the brutal 14-year conflict, which finished in 2003. GUINEA-BISSAUIn 1999, ECOWAS sent around 600 ECOMOG troops to preserve a peace deal in coup-prone Guinea-Bissau. In 2004, they were integrated into a U.N. peacekeeping force.

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Persons: Abdourahmane Tiani, Balima, Mohammed Bazoum, Samuel Doe, Charles Taylor, Ahmad Tejan Kabbah, Yahya Jammeh, Adama Barrow, Anait Miridzhanian, Alessandra Prentice, Kevin Liffey Organizations: REUTERS, Economic, West African States, ECOWAS, West, ECOWAS Monitoring, Human Rights Watch, Bissau . Rebels, Islamic, Restore, Thomson Locations: Niger, Niamey, LIBERIA, Liberia, SIERRA LEONE, Nigerian, Sierra, Freetown, GUINEA, BISSAU, Guinea, Bissau, IVORY, Ivory Coast, MALI, Mali, al Qaeda, Central, Northern Mali, Islamic State, Burkina Faso, GAMBIA, Gambia, Senegal