The highest decision-making body in Nigeria under the Buhari's military regime was the ________

The highest decision-making body in Nigeria under the Buhari military regime was the Supreme Military Council (SMC). The SMC was the highest military authority in Nigeria and had the power to make decisions on all matters of national significance, including the country's political, economic, and social affairs. The SMC was made up of the top military officers in Nigeria, including the Chief of Army Staff, Chief of Naval Staff, Chief of Air Staff, and other key military leaders. The SMC was responsible for making all major policy decisions in Nigeria during Buhari's military regime, and its decisions were binding on all other government institutions.