 <translate> The important part for answering this question is: The Sierra Leone Civil War (1991 -- 2002) began on 23 March 1991 when the Revolutionary United Front (RUF), with support from the special forces of Charles Taylor's National Patriotic Front of Liberia (NPFL), intervened in Sierra Leone in an attempt to overthrow the Joseph Momoh government. Therefore, the final answer is 1991. <yor> Apakan pataki lati dahun ibeere yii ni: Ogun abẹle Sierra Leone (1991 - 2002) bẹrẹ ni ọjọ 23 Oṣu Kẹta ọdun 1991 nigbati Revolutionary United Front (RUF), pẹlu atilẹyin lati ọdọ awọn ọmọ ogun pataki ti Charles Taylor's National Patriotic Front of Liberia (NPFL), ti dawọ sinu Sierra Leone ni igbiyanju lati ṣubu ijọba Joseph Momoh. Nítorí náà, ọdún 1991 ni ìdáhùn tó ṣe kedere. 