What was the Nigerian Military charged with ?
Among the group of the July 1966 coup conspirators were officers such as Joe Garba , Murtala Muhammed ( the fourth Nigerian Head of State ) , Martin Adamu , Muhammadu Buhari ( the seventh Nigerian Head of State ) , Paul Tarfa , Jerry Useni and Shehu Musa Yar'Adua ( older brother of the thirteenth Nigerian Head of State ) .