The History of modern Military in Nigeria began with the British incursion into this part of the world. From the humble beginning towards the end of 19^thCentury, the institution has grown to be most enduring one in the modern Nigeria. Her growth could be attributed to professionalism and constitutional role assigned to her; the role that has not only seen her defending the oneness of the nation during the civil war to her incursion into politics. The role that no doubt equally affects her professionalism. It is on this premises that the paper examined the emergent issues that has to do with military as a professional sector and institution in Nigeria.