[1] Coker-Appiah is reported to be one of the officers who was involved in the overthrow of President Kwame Nkrumah's Convention People's Party (CPP) government.
He was the commander of the Field Engineers Regiment based at Wajir Barracks at Teshie in Accra at the time.
[1] During the era of the National Liberation Council (NLC) military government, Coker-Appiah was the administrative head for the Western Region in 1969.
[2] Following the abortive attempt in April 1967 to overthrow the NLC government, Coker-Appiah led investigations that resulted in the public execution of the leaders.
[4][5] In April 1975, he was removed from the NRC government and later appointed the military attaché to the Organisation of African Unity (OAU) in Addis Ababa, Ethiopia.