Most of Kabbah's time in office was influenced by the civil war with the Revolutionary United Front, led by Foday Sankoh, which led to him being temporarily ousted by the military Armed Forces Revolutionary Council from May 1997 to March 1998. He was soon returned to power after military intervention by the Economic Community of West African States (ECOWAS), led by Nigeria. Another phase of the civil war led to the United Nations and British involvement in the country in 2000.