"Apart from a brief period of civilian rule between 1979 and 1983, a succession of military governments ruled Nigeria from the mid-1960s right through until 1999 when a civilian government led by Olusegun Obasanjo, himself a former military head of state, was elected into office. During this era dominated by the military, a small group of senior officers became both extremely wealthy and also very powerful in business and political circles. It was also widely recognised to have been a time in which massive high-level corruption and economic mismanagement severely undermined the country's development."