A cikin watan Disamba na shekarar 1990, kungiyoyin kudancin Kamaru na Birtaniya sun yi kira ga karin ikon cin gashin kai na kudancin Kamaru, da kuma cikakken taimako, har sai da Biya da abokansa suka matsa masa ya yi murabus. Biya ya fara gwamnatinsa ta hanyar matsawa zuwa ga gwamnatin dimokiradiyya, amma juyin mulkin da ya kasa ya tura shi zuwa tsarin jagorancin magabata. An samu matsalar tattalin arziki a tsakiyar shekarun 1980 zuwa ƙarshen shekarun 1990 sakamakon yanayin tattalin arzikin kasa da kasa, fari, faduwar farashin mai, da kuma shekaru na cin hanci da rashawa, rashin kulawa, da kuma cronyism. Kamaru ta juya zuwa agaji, ta yanke kudaden gwamnati na kasashen waje, da kuma kamfanoni masu zaman kansu.
Kasar Kamaru