Règle correspondante
Nigeria
Practice Relating to Rule 153. Command Responsibility for Failure to Prevent, Punish or Report War Crimes
Nigeria’s Military Manual (1994) provides:
Article 87 [of the 1977 Additional Protocol I] thereby enjoins the parties and the parties to the conflict to request Commanders of their troops under control to prevent, and where necessary, to suppress and to report to competent authorities breaches of the conventions and the Protocols. 
Nigeria, International Humanitarian Law (IHL), Directorate of Legal Services, Nigerian Army, 1994, p. 30, § 3.
The manual adds that commanders “should initiate such steps as are necessary to prevent any violations and, where appropriate, to initiate disciplinary or penal action against violators thereof”. 
Nigeria, International Humanitarian Law (IHL), Directorate of Legal Services, Nigerian Army, 1994, p. 30, § 3.
Nigeria’s Military Manual (1994) provides:
Article 87 [of the 1977 Additional Protocol I] thereby enjoins the parties and the parties to the conflict to request Commanders of their troops under control to prevent, and where necessary, to suppress and to report to competent authorities breaches of the [1949 Geneva] conventions and the [1977 Additional] Protocols. 
Nigeria, International Humanitarian Law (IHL), Directorate of Legal Services, Nigerian Army, 1994, p. 30, § 3.
Nigeria’s Manual on the Laws of War provides:
In some cases, commanders are responsible for war-crimes committed by their subordinates. For example, when soldiers commit acts of massacre against the civilian population of an occupied territory or against prisoners of war the responsibility for such acts may rest not only with the actual perpetrators but also with the commander. Such responsibility arises when the acts in question have been committed in pursuance of an order of the commander, when the act is done with the commander’s knowledge or when the commander ought to have known about the act and failed to use all necessary means at his disposal to ensure compliance with the Laws of War. 
Nigeria, The Laws of War, by Lt. Col. L. Ode PSC, Nigerian Army, Lagos, undated, § 8.