translate English to French: The United Nations Mission in Sierra Leone was set up in 1999 as a follow-on operation to UNOMSIL (UN Observer Mission in Sierra Leone) in order to guarantee the implementation of the peace agreement designed to put an end to the civil war that had raged in the country since 1991.
La Mission des Nations unies en Sierra Leone a été créée en 1999 et a pris le relais de la MONUSIL (Mission d’observation des Nations unies en Sierra Leone) afin de garantir la mise en oeuvre de l’accord de paix devant mettre fin à la guerre civile qui frappait le pays depuis 1991.