Definition and sources of constitutional law: classification of constitutions: written and unwritten, rigid and flexible, federal and unitary, presidential and parliamentary. The concepts of separation of powers, the rule of law, federalism, the supremacy of the constitution/parliament; The legal consequences of the change of government by extra-constitutional means (e. g. coup d’état); pre-colonial constitutional systems and constitutional history of Nigeria from the advent of British rule up-to-date; The Military and Constitution-Making in Nigeria, Law Making by the Military, The Judiciary under the Military, The Executive under the Military, The Military and search for constitutional and political order.